No.

…Soviet troops entered eastern Poland…

Whether the territory truly belonged to Poland is irrelevant. Frankly, I don’t give a shit whether Stalin was justified or if Poland was already collapsed. It’s just a matter of fact that they helped invade Poland. Russia and Poland still had a skirmish. Stalin and Hitler were in the talks. No reason to dance around it.

But just downvote me, it’s fine.

Didn’t Stalin help Hitler invade Poland?