Atheism vs Christianity?

Everywhere I go, there's atheists and christians fighting each other to prove the other one wrong. Why do people do this? There is no absolute proof that one exists and there's no absolute proof that one doesn't exist so why fight over what's basically an opinion? Opinions aren't true or false, it's your choice to believe or to not believe but don't push it on others. I think we can all agree that Christianity is the most popular religion on this planet, that doesn't mean it has to be everyone's religion. People go out of their way to make fun of each other just because of a different belief. Why do we do this when there's nothing to gain and we still don't know the truth?
Atheism vs Christianity?
Add Opinion