Russia knew a launch on America would trigger a response in kind. MAD as it were. Russia did not want to wipe America off the map.Iran on teh other hand has repeatedly said it will wipe israel off the map. Israel woulod be justified with a pre emptive strike as much as some would complain, the world would breathe easier because a trouble maker would have been dealt with. As long as iran is anti israel and continues ton fund and arm terrorists whoch are alignbed against israel, Iran will be number one on a nuke target list from israel.
10 arrested at Israeli Arab protest in Ramle (Haaretz)