On a site whose algorithm likely pushes fascist content it's nothing surprising that two people would come across a popular fascist post.
and I’ve never seen it
I'm not saying you've seen the thread on /pol/ (I found it by searching for the dogwhistle "every single time"), but it's, uh, strange that your post could be replaced with the one from /pol/ and vice versa and they would function the same on both a fascist and on a Marxist-Leninist(?) forum.
I think that the user ImperiumFirst whose banner is this:

and who describes himself as "Political Extremist | America First | Christ is King ✝️", and whose pinned tweet is praising Kanye West for using a swastika, and whose feed is currently filled with Nick Fuentes videos...
...is in fact a fascist and probably a /pol/ user.
Do you follow that guy? Or did the site correctly assume you'd like his tweet?
And yes, the wording, that you're acting is completely neutral, is indeed regularly used by fascists "just noticing" Jewish undermining of the White race, even by the very same profile here:

For a supposed Marxist, you're oddly oblivious to fascist iconography and memes, and uncritical of the content served to you by a fascist-owned website.
Yep. W40k may or may not say something about someone's politics, but the whole combination in the pic is just too much (greentext, "@ImperiumFirst", it's da joos). To dispel any doubt, check his feed: https://xcancel.com/imperiumfirst