What was the outcome of the crusades?

The Western or Christian world lost the military aspect of the crusades. The crusades caused the final collapse of the Byzantine Empire. At the same time, Islam underwent a fundamentalist reaction. Many scholars fled to the West. The tremendous increase in scholars greatly benefited the West. They saved many books from the book burnings and took the books with them. The crusades greatly helped the Renaissance in Europe. We can picture something similar as what happened to the situation when the Taliban took over Afghanistan. Artists fled with their art rather than have the Taliban destroy it. Europe would be richer for welcoming them. Other scholars fled with their tools of trade. Islam gained land. Europe gained intellectual ability.