Instead of illegals, call them undocumented
or
instead of handicapped, call them physically challenged
or instead of black call them African American...

NOT:
Should not discriminate Muslims because of their believe or cultural heritage. Because it is right, political or not.

If you like, this is another way to say it:

It is not Politically incorrect to say:
We should discriminate Muslims because of their believe or cultural heritage. It is purely wrong, not just politically wrong.