We live in the 21st Century. We are beyond using offensive slurs about the shanty Irish as our team's mascot. The potato famine happened a long time ago. Let's get over that.
I disagree with your suggestion about "The Crusaders." That is too religious. It might offend non-Christians. We don't want to do that. I suggest we follow Stanford and rename our disgusting "Fighting Irish" to "Green."
The University of Notre Dame Green. Much better. Only ignorant assclowns would want to keep "The Fighting Irish."