Okay, so what if instead of teaching others to follow him by being the example first, Muhammad (PBUH) just sat in his house and said to Allah “let the others try too, why should I do good if nobody else is doing it?”. Do you think islam would be the same then?
So you would literally go against the Quran and Sunnah which say that even if your enemy does the most Sub-human of things, you cannot return the favor and must be civilized?
So tell me. How are you lot better than them? Or do we just leave Muhammad (PBUH) to do the good deeds and we should only do them if others do them? Mashallah to your logic.