The bible has it's own fair share of violence, genocide, immorality etc. As the quran if you'd dig deep into it. I think the difference is that there are a lot of apologists and leaders who interpret the bible differently scrubbing out all the bad things there while muslim leaders are somewhat purists, sticking exactly to their holybook quite literally.
This whataboutism has been brought up already about 5 times. The difference is Christianity has gone through a reformation process where the church and the state have been split into separate entities. Islam has not gone through this reformation process.