Oh c'mon... [do you beat off to recordings of The Apprentice?]This was a typical Trumpian 'trolling' move which was quite brilliant!
The story of the 'dancing israelis' was not well known at all (except by conspiracy theorists). If it was ever mentioned at all in any media, it was implied that it was false 'antisemitic conspiracy theory' disinfo.
By referring to these israelis as 'muslims' it got a lot of attention all over the media. People set out on a mission to 'debunk' Trump ended up finding a story 'not fit to print.' If he would have said, 'dancing Israelis,' he would have been labeled an anti-semitic neo-nazi.
Trump has used this same trick many times for many purposes in order to force attention onto something which was meant to remain 'hidden.'
"We are at war against a hidden enemy."
-President Donald Trump