The debatable part is that the USSR might have considered it a valid tactic to buy time, which is the main thesis of the specific post quoted above. I think it is a postwar rationalisation and Stalin had no qualms about working with Hitler, but that is also debatable.
Indeed, thanks for pointing it out.
What however isn’t debatable is that community moderators can and should remove comments that are only made to derail discussions.
I read the whole chain of comments, it actually was started by another commenter that mentioned Poland, and then started the whole thing. You can have a look here if you are interested: https://slrpnk.net/post/10244872/9112924