Frees up more money and military potential to give to Israel or fight Iran with.
I guarantee you that most of the money savings Trump is trying to do by cutting all that government waste and shutting down the Democrat gravy train via DOGE, happens mostly only to redirect more of that money towards the Greater Israel project.
American citizens may get some minor tax reductions out of it so they're more motivated to fight for Israel.

Literally every single thing Trump does must be scrutinized under the premise of how it benefits Israel or world jewry first and foremost.