MP Naz Shah was suspended for saying something similar.
The website has also uncovered other post by Mr Aziz, which promote well known antisemitic tropes.
One refers to the Rothschilds control over David Cameron and Israel being given “illegally” by the UK.
Mr Aziz also posted a graphic about “drinking Gaza blood”, and compared Israelis to Nazis.
Last week, a councillor who was employed by Labour MP Naz Shah as a parliamentary aide was suspended from the party over antisemitic social media posts.
Mohammed Shabbir, who represents Labour on Bradford Council, sent tweets which referred to a “Palestinian Holocaust in Gaza” and repeatedly used the term “Zio”.
Mr Shabbir told the website Guido Fawkes that he had been suspended by the party over the comments.
In a blog post about sex crimes and grooming, he claimed Russian Orthodox Jews were involved in “the sex trafficking trade - demand is particularly high among Charedim, the conservative Orthodox Jews, many of whom are regular clients of brothels…”.