I think the shyt is horrible and fukked up, and I absolutely think the 'doctors' and soldiers who took part in it should have been tried for war crimes, tortured to the degree of pain the inflicted upon others, and executed (which never happened, because the US gave them full immunity in exchange for the information to fund even more weapons research. Whoever made that decision should have been thrown in jail too).
That said, I don't have beef with Japan as a country because it is literally a completely different society than it was historically. WWII left it completely ruined and its society has been effectively reborn, as far as I've heard they barely even have a military now. It's not like American slavery where the prejudice, hate, and effects of it have lingered on to this day, and the perpetrators stayed in power. Japan was literally destroyed.
I'm aware that there's still racism in Japan itself, but until I have direct experience with it, I won't speak on that; all of the Japanese Americans I've met have been cool.
And to the Israeli and Jew thing, yeah, it's fukked up. You have younger Israelis wishing death upon their own people, including literal Holocaust survivors, because they don't support what's being done to Palestine. That's how people pull off genocide, they work the masses up into an irrational nationalistic frenzy. They're evil.