There’s nothing wrong with believing in God. There’s nothing wrong with being Atheist. There’s nothing wrong with religion. Let people believe what they want to believe. If people want to pray, let them. Stop pushing religion or Atheism on people; it’s none of your business what they believe. And, it’s definitely not something to fight about. Especially online.
I’ll stop fighting people about religion when Christians and Muslims are content to keep religion in their homes and churches as opposed to exploiting secular law in an effort to force Non-Christians to behave in a manner that they (wrongly) deem appropriate.