When all Scotsmen are compared to Scotty, the logical fallacy is deemed null and void. He is the only true Scotsman. /

Seriously though, this is a problem that is found all across the political spectrum and every group on the planet engages in this in some fashion (excepting the Palestinians, who instead of excoriating suicide bombers and terrorists and generally scum of the earth who murder women and children and who think that this is the best that they can ever hope to achieve, will honor them and call them true Palestinian heroes).