Wotsie, The church has done many bad things, they have also performed the ultimate act and carried/saved Christianity, The Jews were persecuting Christians from day dot, they even used their useful idiots, romans (like they do to this day) to persecute those Christians in the Roman world.
And as with any behemoth corporation there will be a certain level of corruption, it's currently right at the top as we speak.
What you are doing with is what the Pharisees did to the OT, firstly the promised seed was not pertained to them, secondly they were putting their own spin on it, like you my dear
