http://www.worldtrek.org/odyssey/mideast/042200/042200monjews.htmlhttp://www.bintjbeil.com/articles/en/021016_arabjews.htmlCensus reports say 8,000 in Arab League, 450,000 in Iran (with two million Arabs). There are more who don't identify as such in the census.
The crimes of some their (ostensible) co-religionists in Israel must make things difficult for them, but I greatly admire their determination to remain. Not that I would want to live in Israel either.
Your source denies their existence. Perhaps it has an agenda?