It's hard to not be cynical nowadays when every fuckin thing is a hustle. What's worse is legitimate charities losing their capacity after being labelled a terrorist organisation or some other bullshit. Food not bombs is a legit charity, but I think they're listed as terrorist because of their politics.
A lot of those Jewish charities are partisan groups helping the apartheid regime in Israel. How the Jewish culture and the state of Israel became synonymous is a startling display of the power of propaganda. You really have to read up to find any charities that aren't just corporations masquerading as a humanitarian cause.