From what I've seen, it virtually always is.

That's an outrageous statement. The majority of jewish people I know do not support Israel's policies/actions (which, by the way, not supporting its policies/actions does not equate to not supporting its right to exist), and I know many. Are they all anti-semites? I've been to Israel, and many (jewish and not) Israelis I met don't support their nation's policies.

So, can confirm, in the real world it sometimes is and sometimes isn't.