There is quite a bit of evidence that pro Israel Lobby groups, as well as Israeli Embassy Staff are heavily involved.
There is a documentary about the whole issue from Aljazeera, which allegedly got censored due to intervention by the Qatar government.
https://www.haaretz.com/israel-news/.premium-parts-of-censor...
Some reporter went undercover for 6 month with a hidden camera infiltrating some of the groups.
https://www.aljazeera.com/investigations/thelobby/
As a result, one embassy official had to resign
https://www.aljazeera.com/news/2017/01/israel-diplomat-force...