Why do Poles still despise Germany? It seems so pathetic, every Polish nationalist still blames Germany and Russia lol. What do they think will happen if they blame both of their neighbors?

The Germans were pretty smart. When it comes to what they actually did in World War II, it was mostly just attacking a small, weak country like Poland. I mean, Poland was weak, so it's kind of understandable that they got targeted.
And even today, Poland is still weaker than Germany, so the Polish government and people can't really say much to Germany.

If Japan had just stopped with Korea, things might've been fine. But for some reason, they went off the rails and decided to invade China too.
Seriously... our ancestors must've been out of their minds to pick a fight with China, a country with more than ten times our population. It's no wonder the Chinese still hold a grudge. What a foolish move.