IMO people just use the term to mean “pro-Israel” rather than in any reference to the original meaning ("supporter of the idea of a Jewish state"). Which could mean any combination of “pro-American financial support for Israel”, “moral support for Israel in their various military actions”, “opposed to the creation of a Palestinian state”, “a belief that Israel should continue to exist as a Jewish state”, and so on. It's more about the broad political alignment than the specific meaning of the word.