I don't think this is true in general. Many people that support Israel are critical of Israeli policies in the west bank (including the US administration).
I think there's a problem when you apply different standard to Jews vs. everyone else or are parroting some narrative that has anti-semitic aspects to it.
For example, I would call people contesting the right of Israel to exist, despite many generations of Israelis living in that area, despite the UN's recognition of the state of Israel, and despite the historic connection of the Jewish people to that land (and there are ofcourse many non-Jewish Israelis which people tend to overlook), anti-semitic. If someone aligns themselves with this message, I would also tend to consider them anti-semitic.
I would likely agree with much of your criticism of the west bank settlements and the behaviour of the settlers there and in general that is not anti-semitic. It's not black and white- there are many lies being propagated and there is are many truths that deserve criticism. Propagating lies about jews is basically what anti-semitism is all about and it is rampant.