That's why you'll see me speaking passionately about the beauty and greatness of Islam, while properly deploring the Islamic fundamentalists who use and sponsor terror; and the same for Judaism and Christianity or whatever tradition.
What I'm criticizing is the way some Christians use the Bible and quote from it in order to harm or oppress members of groups they don't like. Historically, these groups have been Jews and homosexuals. Maybe I should try to post more snippets from A Distant Mirror to show the scholarship and historical foundation for this fact. I was planning to do this sooner, but got busy. Maybe tonight.
Anyhow, in a way, the ultimate oppressor is the class system, and Christianity can be seen as a tool and agent in furthering that oppression through its teachings and practices many of which foster a kind of childlike dependence on paternal authority. This, and the sexism inherent in the promotion and worship of a "male" god, is problematic, for it hinders the liberation of many and the ability of humans to do their own good thinking.