most christians accept evolution and what the fuck difference does it make to your life if a few don't? i dont see them cutting heads off and putting people into slavery because their religion tells them to.
Christians most likely not going to chop off any of your parts if you not acting as they like. They also not used to blow themselves off on crowded places. Most importantly if some of them would do the above mentioned things they surely not going to be celebrated as the heroes of christianity. So yes there are some objective measures what can make a given religion worse that others.
You no longer see them doing so. Only few decades ago they were still hanging black people in the USA.
Christianity is 2000 years old. Until it reached 1700 it was still really usual to see Christians burning people alive. Until 1500 it was common to go in other countries and chop heads because they were not of the good religion.
Islam is only 1300 years old. Seems to me that the two religions are rather equivalent. It's just that one is older, but they're both dumb and violent religions.