people construct their own idea of God to match their own preferences.
South Africa used to have a God that approved of Apartheid. Britain used to have a God that approved of slavery. Some people have a God that approves of subjugation of women. Some people have a God that approves of the stoning to death of Adulterers (but only if they're female ones). Some people have a God that thinks you should pray in Latin and some people have a God that thinks you should pray in your own language. Some people have a God that says Transubstantiation is true and some people have a God that says it isn't. Some people have a God that says women can be priests and some have a God that says they can't. Some people have a God that thinks you should have lots of wives and some people have a God that thinks you should only have one. Some people have a God that thinks it is best to have a wife and children, some people have a God that thinks it is best not to.
So their God is always on their side.