This is actually really screwy.
Tats portrayed the invasion of Poland as Germany liberating the country from the Soviets. But here, Japan is not liberating China from anyone. The Japanese occupation of China is simply not shown and is barely mentioned, we’re just meant to assume that it’s benign based on absolutely nothing. Up to this point¹ in-story, there’s not been any mention of China being “jewed” or under any sort of outside control or malign influences. There’s also no mention in-story when the occupation started, other than it was almost certainly² before Hitler helped “wake up” the spirit of Japan and overthrow the Tengu, which incidentally, doesn’t seem to be complete yet, as the ‘Gu influences are still there. Even completely ignoring real history and focusing solely on what’s presented-in story, there’s been nothing to suggest that the situations involving China and Poland are meaningfully comparable, or that this message is in any way coherent.
I guess if you tried to sanewash it, perhaps the “you” in question refers to the Allies in general and not the US specifically, whose intentions towards China are the same as Soviet intentions towards Poland, because the whole is as bad as its worst members, so China is better off under the thumb of the semi-unJewed Japan rather than the fully-Jewed allies. But this requires some presumptions about what Tats is thinking (assuming he even is thinking) which are thus far not confirmed by the comic itself.
¹There’s a reason why I said “up to this point” - in a very recent comic a young Mao Zedong is shown receiving a “Bolshevik starter kit”.
²Tats jumps around in time a bit, so it can be difficult to tell what the exact chronological order is meant to be in-universe.