You already answered your question.
The crusades had a huge financial impact on the fudal system as lords and Barrons sold assets and much of their property to Finance crusading, Manny of these men died and left their families in debt, those that were too old for war lost sons an heirs also leaving behind bebt, this led to what we would now call a great recession.
One issue is in Australia, they protested for the immigration of Muslim people. It was a self-defense mechanism from outside nationalities and a counter to things that they would encounter in the future. They wanted to have more entitlement because they are the real citizens of their own soil. Data came from abc.net.au/news.
