Why do you suppose that in recent times there has been so much concentration on certain historical events a full millenium ago?
We have an example of muslims attacked in force by 'christian' armies - that's why!
Such actions since are hard to find!
The Crusades are simply meant to divert our attention away from extremist muslim atrocities in the here and now. Consider the number of Islamic countries which persecute Christians TODAY. It is certainly a significant majority.
Such actions since are hard to find!