Of course election is only a part of the broader consideration of the entire decree or plan or sovereignty of God. These objections are the ones usually raised against that doctrine.
A. It Equals Fatalism
Popularly, this objection is expressed like this: "What's going to be is going to be anyway, and I cannot do anything about it." There are two very important differences between the biblical doctrine of the decree of God and the false teaching of fatalism. (1) Behind the decree is an intelligent, loving Being. Behind fatalism lies only impersonal blind chance. (2) Fatalism has no place for the importance of means. It only emphasizes ends. The decree of God includes all the means essential to arriving at the ends. And those means are as essential as the ends. Thus, the biblical doctrine gives proper place to human responsibility. What's going to be is going to be through certain means and procedures and responsible human actions. Ephesians 1:11 spotlights all things, not solely ends.
B. It Is Inconsistent with Human Freedom
This is the same objection raised in Romans 9:19: Why can God fault anyone, since no one really resists His will if everything is part of His plan? Though it is true that God has the right to do anything consistent with His nature, it is equally true that He has chosen to exercise His rights by including the responsible and relatively free actions of people (Philemon 14; Revelation 17:13 linked with v. 17). I say relatively free simply because no one has absolute freedom, if for no other reason than the limitations of being fallen human creatures. He has made us responsible, and when we fail to act responsibly we are justly blamed.
An illustration: Does God know the day you are going to die? The answer is yes, He does. Question: Could you die a day sooner? The answer is no. Question: Then why do you eat? Answer: to live. The means of eating is essential to the end of living to the preordained day of death. From this point on the illustration can easily and uselessly get into the realm of the hypothetical. Suppose I do not eat? Then I will die. Would that be the day God planned that I should die? These are questions that do not need to be asked or answered. Just eat.
Or to change the illustration: Has God planned the answers to my prayers? Yes. Then why pray? Because those answers come when I pray.
Or again: Does God know who are elect? Of course, He elected them. Can any of them be lost? No. Then why pray and witness? Because that is how they will be saved. Will any of them fail to believe? No. Then why do they have to believe? Because that is the only way they can be saved, and unless they do believe they will not be saved. Do not let your mind ask the theoretical and useless questions. Let your mind and your life concentrate on doing what is God's will and making sure you act responsibly.
C. It Makes God the Author of Sin
I think we must acknowledge that God did construct a plan that included sin, and its inclusion did not come as a surprise. Yet we must guard the clear teaching of Scripture that God hates sin (Psalms 5:5), that He is never responsible for our committing sin (James 1:13), and that including sin in His plan does not make it somehow less sinful and us less culpable.
All that the Bible says about the concrete appearance of sin in creatures is that it was found in Satan (Ezekiel 28:15). Isaiah 45:7 may refer to God's including evil in His plan; some understand the verse to refer to the results of sin, such as calamity. Proverbs 16:4 teaches also that all things are included in God's plan. We must seek a balance in this truth and live with the unresolved tensions.
Finally, face the ramification of all things not being included in one way or another in God's plan. This would mean that there were things outside of His control, and that is a frightening idea.
Listen to these words of Calvin:
Herein appears the immeasurable felicity of the godly mind. Innumerable are the evils that beset human life; innumerable too the deaths that threaten it. We need not go beyond ourselves: since our body is the receptacle of a thousand diseases - in fact holds within itself and fosters the causes of diseases - a man cannot go about unburdened by many forms of his own destruction, and without drawing out a life enveloped, as it were, with death. For what else would you call it, when he neither freezes nor sweats without danger? Now, wherever you turn, all things around you not only are hardly to be trusted but almost openly menace, and seem to threaten immediate death. Embark on a ship; you are one step away from death. Mount a horse; if one foot slips, your life is imperiled. Go through the city streets; you are subject to as many dangers as there are tiles on the roofs. If there is a weapon in your hand or a friend's, harm awaits. All the fierce animals you see are armed for your destruction. But if you try to shut yourself up in a walled garden, seemingly delightful, there a serpent sometimes lies hidden. Your house, continually in danger of fire, threatens in the daytime to impoverish you, at night even to collapse upon you. Your field, since it is exposed to hail, frost, drought, and other calamities, threatens you with barrenness, and hence, famine. I pass over poisonings, ambushes, robberies, open violence, which in part besiege us at home, in part dog us abroad. Amid these tribulations must not man be most miserable, since, but half alive in life, he weakly draws his anxious and languid breath, as if he had a sword perpetually hanging over his neck? You will say: these events rarely happen, or at least not all the time, nor to all men, and never all at once. I agree; but since we are warned by the examples of others that these can also happen to ourselves, and that our life ought not to be excepted any more than theirs, we cannot but be frightened and terrified as if such events were about to happen to us. What, therefore, more calamitous can you imagine than such trepidation? Besides, it is an insult to God to say that He has exposed man, the noblest of His creatures, to the blindness and temerity of fortune.
Then join with Paul in his magnificent doxology that comes at the conclusion of his lengthy and detailed section on election when he wrote: "Oh, the depth of the riches both of the wisdom and knowledge of God! How unsearchable are His judgments and unfathomable His ways! For who has known the mind of the Lord, or who became His counselor? Or who has first given to Him that it might be paid back to him again? For from Him and through Him and to Him are all things. To Him be the glory forever. Amen" (Romans 11:33-36).
Basic Theology, Charles C. Ryrie