To those that trot out "I don't care if its teachings are false, I'd never leave because it's the best way of life":
(John 4:24) . . .God is a Spirit, and those worshipping him must worship with spirit and truth.” Do you think the God of Truth would approve of being worshipped with falsehood?
If you really believe that a religion's teachings do not have to be true - just so long as you have a nice, moral life - why the hell do you criticize other churches?