In ANY religion there is usually a LARGE amount of "data", or "dogma", or "scripture", or whatever. There is LOTS of it, often with many contradictions in meaning and expected behaviors. At ANY point in time, at point in history, some group or person of authority decides which exact points will hold the most importance, which will possess the least importance, and with all other aspects of the "faith" lining up between those two extremes. This CHANGES with time, depending on WHO is doing the interpreting. The magnitude of importances and the relationships between various notions SHIFTS and CHANGES over time. That is just the way it is human human societies and groups (when examined over longer periodds of time).
There are two aspects to it. There is the raw data - the "dogma" (the subject materials), and there is WHAT any group of people does with it in terms of interpretation, sorting out of meaning and importances, and actual behavior with other people. Yes, the "materials" DO DEFINE AND ENCOURAGE certain behaviors. But, the force on various points differs for each religion, and changes over time with each. Currently, some aspects of Islam and ALL of organized Scientology are extremely FUNDAMENTALIST (sticking 100% to "what is written").
Christianity was insane for a great part of its history. But also, and not that this excuses it, but the ENTIRE WORLD has been insane for the great majority of its history. Today, in modern times, Christianity is NOT at all the SAME as it was in 16th Spain during the Spanish Inquisition. Personally, as I see it, to still carry a strong feeling of dislike towards Christianity, today, implies that the person with such a view is somewhat stuck and obsessed with the PAST.
Such a person enters "omitted time" into their framework of thinking by disregarding that these "crimes of Christianity" are largely in the past, and ANY such crimes that exist today (bombing abortion clinics, beating up gays, etc.) are committed by a VERY SMALL segment of the Christian population.
It doesn't matter that Christianity has "so much blood on its hands" - Christianity (as some "thing" to like or hate) is only an ABSTRACT IDEA. There is no such thing as "Christianity" outside of the general diverse subject materials, and WHAT any person DOES with those materials at any time. Today, most people do NOT use it to encourage or justify any sort of "religious crime". Most people are involved with for 1) a sense of community, 2) SOME form of encouragement to try to be a better person, and 3) a spiritual connection and/or guidance. THAT is what it is to and for most people TODAY.
Any IDEA about it "having all this blood on its hands", other than as an historical fact of the PAST, is created in YOUR HEAD, and then you react emotionally against this self-created IDEA. I mean, sure, if Catholic priests were dragging people out of their homes, conducting shame "trials", and then torturing and murdering heretics NOW, today, in modern times, then HELL YEAH, GET MAD and FIGHT it until they are GONE. But, that is NOT today's actual situation.
I suggest that you get into PT.