Why are today's theists regularly held "guilty"for the Crusades but atheists deny any blame for atheist horror?

You do realize that Albania is Muslim/Christian, and many of Christians left the country because of the persecution by Muslims. Mother Teresa was Albanian....and it is the conflict between Muslims and Christians in that country that caused the "atrocities"--I know this because I know many Albanians myself who came to the States because of these events.