It was a cliché one-liner on a divisive theme that was far off topic. That certainly counts as flamebait. This is not a borderline call!

Sometimes people make a more substantive comment in response to a moderation scolding—sort of explaining the background that was in their mind but which they didn't say earlier. I'd say your second and third paragraphs here count as that. If you had included that in your original post, it would at least have been not a one-liner and less of a cliché, and I probably wouldn't have replied.