Not exactly. I would never say that the "only good Moslem is a dead Moslem." That would condemn my own father to death.
Rather, I would say it thus: "The Moslem who is good is not a good Moslem". Most Islamic leaders would agree with me, at least as long as I defined "Moslem who is good" as someone who did not seek to impose Islam and sharia law on mankind, by the sword if necessary, and as someone who respects EQUALLY (i.e., not as dhimmis) people of other faiths.