The main reason is that you're shameless liars for your cult who take ZERO responsibility for the CRAP you put in our homes, hotels and cities.One main reason why atheists ridicule Christianity is because when other people believe(or do) different than them, it doesn't make them feel good. That's all they care about is them feeling good. So they attack because they have the intellect of a cave man. But the real problem is that what other people believe shouldn't affect how atheists(and other non-Christians) feel. Athiests and other non-Christians shouldn't be taking things so personally.
Your cult is a disgusting testament to hate - your bible tells all your mentally ill followers that atheists are fools, based on ZERO evidence.
When you've finessed apologising for your cult, you then need to look into your own conscience and decide if lying about god is the path you want to really take in a world which is verified by science every single day - sh*tting on your cult's claims.