yes the pope did raise a call to the crusades, but we shouldnt forget that it was only after the byzantine emperor asked for help, as they were being overrun, and europe saw islam as a threat, coming in from the east, and from the south of spain.

there was a lot of war tied to Christianity, mostly within Europe though, in conflicts such as the 30 years war, where politics was just as much at stake as religion; after all the 30 years war was rooted in Germanic princes vying for power. In England burnings happened because there was a political conflict over lines of sucession. Because European society at the time lacked any strong idea of government tied to natural laws, leaders appealed to some type of providence for governing; and most of the religious persecutions carried out were done by the state.

Injustices from religions in colonial settings were more about not respecting local culture, than justifying war.

I don’t think its uncalled for to contrast that with the history of Islam, which expanded mostly by military conquest, and has always been linked to concepts of theocracy. Military conquest by Islamic rulers was justified by the idea that if there were muslims being mistreated anywhere, they had a right to go to war.

so, you can very easily criticize both religions,  for being tied to deaths or injustice, but I think its fair to characterize Islam historically as being more of a militant religion.