Another atheist argument that I think is logically flawed is the statement that because evolution can explain why people have religious beliefs, those religious beliefs must be false. If God exists, he could simply have made us this way in order to make it easier to realize that he exists. So it shows why people might believe in God even if he doesn’t exist, but it does not show that God is merely imaginary.
This is an interesting topic, because I don’t agree that evolution does explain religious beliefs. In one sense, people can explain anything by inventing some evolutionary explanation. Thus for example one can come up with evolutionary arguments showing that monogamy has evolutionary advantage, and one can come up with evolutionary arguments showing that promiscuous sex has evolutionary advantages. Well, which is it?

And it’s easy to come up with a long list of similarly contradictory behaviors that can be “proven” through evolutionary arguments.
But I find it hard to believe that believing in non-existent beings, and devoting great time, treasure and talent to these non-existent beings, can offer evolutionary advantages that cannot be gotten in other less costly ways. And I would invoke Occam’s Razor here to bolster my argument that belief in non-existent beings is not the most efficient or logical explanation for the behaviors that are said to follow such belief.
Another argument that just doesn’t work is Pascal’s Wager, which says that an atheist loses nothing if he accepts Catholicism and has everything to gain if it turns out to be true. Because of this, an atheist should supposedly try to believe. One problem is that religion isn’t completely costless (going to mass, giving money to the church). So in order for the wager to work, there must be some evidence that Catholicism is true, otherwise we should give all our money to anyone who walks up to us on the street and says that he will somehow give us infinite happiness in exchange. Since there are many contradictory religions, someone would have to consider every possible religion, and pick the one with the most evidence. It would take more than one lifetime to thoroughly consider the evidence for the many thousands of religions (and only considering the most popular is not good enough). So this does not really work as a way of deciding what to believe, and it really all comes down to whether the evidence for Catholicism is enough to conclude that it is probably true. Pascal’s Wager is an attempt to get people to accept weaker evidence, but it only works if people already have good enough evidence to convince them that Catholicism is probably true, in which case the wager is not needed.
Two thoughts here. First, if there is some God who desires to make himself known to us, we must assume that he has arranged things so that it would not take more than one lifetime to do so. Otherwise that God is simply incompetent.
As for Pascal’s Wager, it must be understood to be simply a starting point. I don’t think anybody should become a Christian because of Pascal’s Wager, but I do think that it can get people thinking about the consequences that follow if the Christian view is true.
Finally, regarding the question of evidence, I find that atheistic arguments on that score to be especially weak and one-sided. What atheists don’t realize, or actively deny, is that their position is every bit as much based on faith (belief in things not proven) as the theistic (Christian, since that’s what I believe) position.
Let me explain. Both Christians and atheists must account for the existence of the world (that is, for everything). The existence of the universe, life, human beings is the starting point. Christians offer an explanation, a First Explanation, and they offer evidence (whether you accept that evidence is another question, but the fact is that they do offer evidence).
But atheists offer no such First Explanation for the existence of the world. They simply take it as a given. They take it as a matter of faith. They offer no evidence that the existence of the world has a “natural” First Explanation, but at the same time the challenge the evidence that is offered by Christians. Thus atheists display a stark double standard on the evidence question.
And not the least of that Christian evidence is the fact that people who claimed to be eyewitnesses to the teachings and workings of God Incarnate allowed themselves to be brutally persecuted and often killed rather than recant that eyewitness testimony. Where is the logic in such behavior, if they had just made it up?