Netanyahu having had people transfer cash was a big scandal in Israel.

Trying to murder the negotiating team in Doha was an effort to stop the US from pushing through 'a deal' as it's commonly been called. They've previously been successful at this and it likely annoyed the US that the israelis failed.

The thing is that "Hamas" is used as a synonym for words like "terrorist" and "palestinian" and "arab", and in some circles in the US and largely in Israel "Qatar" means the same thing. It's the un-chosen people that need to serve or die, basically. Hence the anger at Netanyahu, and an important reason why he clings to power, he doesn't want to step off until he's made history some other way that makes israelis forget his scandals.