All science is materialistic

[GrandizerII]

It would certainly put physicalism into doubt here, though there will still be explanations that save physicalism in this case. For example, super advanced aliens that are able to trick our eyes using super advanced technology far beyond our comprehension.

Well, then, let's say that after all of this a god, super being, etc., showed-up glowing with white rage and began torturing any doubting physicalists from the inside out until they, willingly or not, changed their minds and publicly recanted physicalism?

Putting aside the fear factor, someone who's strongly physicalist might still say it must be aliens using super advanced technology to manipulate us, because to them that will always be more plausible than truly supernatural (non-physical) beings. I think for many, the core of their worldview assumes things like physicalism and they use that to judge whether some hypothesis/theory/view is falsifiable or not (but not physicalism).