Can’t they face criminal consequences for that , or at the very least major civil consequences
Possibly, as Hamas is on the State Department's list of proscribed foreign terrorist organizations that it's illegal for American citizens to financially support.
One thing that's fairly amusing about the whole deal is that they were trying to solicit the donations via Venmo. An incredibly easy to trace (and reverse method), it'd be like Paypaling someone for illegal drugs (and putting "cocaine" or "heroin" in the info on the transaction.)