Key words here "in the past" as in a couple centuries ago and longer. Other religions have similar history. Most grew up/evolved.
Muslims are still in the dark ages and will continue to remain there. I don't see an "enlightenment" for them anytime soon unless it is delivered by General Dymanics and guided by Ratheon.
The fact is when Christianity was synonym of terror in Europa, islamic territories appeared to be more "pacifist" or at least, less intolerant.
Today, Christians or their descendants judge a part of the world for acts their ancestors comited on a larger scale whereas at this time, this same part of the world would have the right to blame your ancestors.
It's not a question of dark age, the problem is
this generation is influenced by obscure persons like fascism or communism were the dominant ideologies for most europeans only 70 years ago, like racial segregation only started to decrease from the 60's in USA etc...
Everything can change radically again...