I don't think any of the tankies I've seen on this site have been Zionists – they usually use Israel as an example of Western imperialism actually. I'd find it kind of weird for them to be Zionists, since that part of the Middle East has a LOT of socialism – the PLO is made up of mostly socialist & social-democratic entities (led by the left-leaning Fatah party), and is the "legitimate" Palestinian West Bank government, although they're the opposition coalition in the territory's legislature, which is dominated by Hamas since the country's last election in 2006 (the next election was supposed to happen in 2021, but it was and still is postponed by Hamas due to Israel continuously blocking Jerusalem's Arab residents from voting; the recent genocide has seen a sharp drop in Fatah's popularity since they primarily advocated for peaceful means of resolving the conflict).

Tankies ARE definitely genocide deniers in another sense though (Uyghurs) so it's not much better. I remember a lemmy.ml comment I posted getting me banned from the site, since it was maps of countries' foreign investment amounts from China, countries' economic reliances on China, and countries that voted against recognizing the Uyghur genocide (a China-enjoying commenter was arguing that predominantly muslim countries' governments didn't vote for condemning the Uyghur genocide in the UN, therefore it's unreasonable to say that there is one; of course, the governments in question were almost all relatively poor/impoverished/struggling/corrupt countries heavily funded by China that also relied a lot upon trade with China, which would suffer greatly from making diplomatic moves against the CCP – it also aligns relatively well with countries that don't have diplomatic relations with Taiwan, of course).