You point out that religion brings nothing into humanity!
Well it is true that very few people let the Bible guide their thoughts & actions. Many state that the Bible's standards are old fashioned. Then there are those who water down its laws & principles for example fornication, adultery, dishonesty & drunkeness.
But, if everyone lived by the Kingly Law, as stated by Jesus Christ - do unto others as you wish to be done by - there would be no wars.
We look at the religious leaders of the mainstream religions and what do we see? They condone homosexuality, divorce, marriage has gone by the board plus they support war. They are certainly no role models for the general populus.
If all religions were false and there was no God, then it might seem reasonable to eliminate religion. However, secular wisdom and materialistic philosophy have failed to blot out religious sentiment from this planet, and atheistic political powers and philosophies have been no more successful. For decades, totalitarian, atheistic Communism branded religion as superstition and “the opium of the people,” removed religious leaders from office and banned their activities, destroyed or looted churches and temples, and brainwashed and murdered worshipers. Yet, such actions did not eliminate religious sentiment. As soon as those governments toppled, religion rose out of the dust with seemingly renewed vigor. In lands formerly Communist, people are again rallying to their old temples, kneeling down in devout worship as their ancestors did before them.
But what if there is a God?