Arguing on Atheists behalf as a practicing Catholic:
Since the beginning of time, all humans were born atheists. The idea of God (or the lack of one) is given to us by our parents or those who raise us.
Point 1. contradiction
The three Abrahamic faiths believe relatively in the same God yet, all 3 contradict themselves. Christians believe that Jesus is the savior of the world and the son of God; Jews believe just as strongly that he is not. Muslims believe that the Qur'an was inspired by God, while Jews and Christians do not.
Point 2. All loving god hating?
"Either God wants to abolish evil, and cannot; or he can, but does not want to. If he wants to, but cannot, he is impotent. If he can, but does not want to, he is wicked. If God can abolish evil, and God really wants to do it, why is there evil in the world?" — Epicurus. Why would such a loving God bring evil to the world, knowing what it would cause.
Point 3. Omniscience.
If God is all-powerful, then by right he could create a being more infinitely more powerful then himself, if so, does this no longer make him God? If humans have at every given moment the free will to choose, then how does God know the future. Are we slaves to his plans? A benevolent God would not have slaves.
Edit: missed the last part of your question. so I'm writing it now
You argue that Atheism is anti-intellectual yet is belief in something that cannot be proven just as irrational and anti-intellectual.
Would simply living a life of morals without the nonsense of God be the best thing to do?