Debunking the "God is Beyond Time" xtian response

[Neo-Scholastic]

As a physicist who has worked with higher dimensions, I'd say that it isn't a fallacy but merely an unwarranted assumption. You can e.g. postulate God having His own time or times as His temporal dimensions of movement which provide Him with something like a dynamical quality (actually doing things in our sense wrt His timeline.) while looking onto our timeline as a dimension which He can access arbitrarily and see whole. This only works if our timeline is deterministic though, but it isn't in and of itself contradictory or fallacious imho.

Indeed, it depends on one's theory of time be it presentism or eternalism or something else. As for me, I see merits to both and remain undecided. I'm not sure what theological problem the Christian friend of the OP hoped to avoid with the phrase "outside of time."