Citation needed. I can cite 100,000,000 deaths attributable to Xtianity in the last century.
You should be ashamed of being a communist because it's a stupid ideology that replaces the "bad state" with the "good state", which soon goes bad as power corrupts.
You should be ashamed of being an Xtian because that's a mindfuck cult that has killed more people in history than any organizing principle, whatsoever.