I think that it is pretty much undeniable that there is such a divergence in how Christian belief is define and what it comprises of that you cannot honestly say that "Christianity teaches you X,Y and Z".
To take an obvious example of homophobia, 'Christianity' will teach you everything from that gay people are abhorrent and should be eradicated, to gay people should be forgiven but 'mended' in their ways, to toleration but they can't themselves be Christian, to there being absolutely nothing wrong with someone being gay and receiving Christian sacrament and marrying.
On an even more basic level, Christians can't even agree on who or what Jesus is - some Christians will tell you that he was mortal but infused with the holy spirit, some say that he was born of God, some will tell you he is God himself.
What I am trying to say, is that people will believe what they want to believe, whether they follow a religion or not. If they are the sort of person who is able to treat others abhorrently, then they will do so regardless of whether they do or don't follow a religion.
Many Christians will tell you that people who behave abhorrently are not 'real' Christians, which I find quite ironic - they expect deference to their beliefs because they say they have a genuine relationship with God, but yet will happily say that other people do not deserve such deference because it cannot be the case that those others have that genuine relationship.
-That has come out a bit muddy, let me try again. A Christian will tell you "I believe X,Y and Z because I follow my faith, and am guided by God that this is what I should believe. My beliefs therefore should receive deference as they come from God". if you point out that someone else who calls themselves Christian and has a genuine belief that God tells them A,B and C, they will say "That person cannot have a genuine relationship with God because God would never say that. Their views do not deserve the same deference as my own".
To an outsider, of course, there is no difference in the 'genuineness' of the belief of the first and second person.
What I am trying to say, is that I don't think that Christianity or any of the other religions provides a 'get out' to believe any particular thing, but it does provide an opportunity for the huge cognitive dissonance available to any person calling themselves Christian to claim that their views are justified and to avoid taking individual responsibility.
*NB references to Christianity also apply to the other Abrahamic religions. I don't know enough to comment on the polytheistic ones.