Again, the Crusades were the west’s attempt to turn back the tide of jihad.
Within only a couple of years of Mohammed’s death jihad had crossed formerly Christian north Africa, swept through Spain, and swept into France.
They had taken the Holy Land away from Byzantine Christians and were slaughtering people there.
And by the end of the middle ages they were at the gates of Vienna.
To complain about the Crusades is to complain that your victim fought back.