They even go back further like 700 years to compare Christianity and the Crusades. Different era different times different culture. Islam is still in the 6th. century.
The liberals seem to return again and again, to what happened in medieval Europe, to find examples of Christian savagery. We hear about the Crusades, inquisitions, burning people at the stake, etc. as examples of the utter cruelty of Christianity. Of how evil was done in the name of Christianity, etc.
What is lacking are modern day examples of this.
So, because some non-muslims committed atrocities hundreds of years ago, that means that all successive generations are prohibited from expressing outrage over the barbaric acts of Islam today, and for the remainder of recorded history?
And misdefine the Crusades while they are doing it.
The Crusades were a defensive action against invading moslim savages. At the time, the middle east was largely Christian. Lacking firearms, both sides were busy hacking each other.