Squinted Eyes

Do you know why the Japanese have squinted eyes? Because nukes are bright.

Explanation

Explain Bear

Listen here, you absolute buffoon. You think it's okay to make fun of an entire ethnicity? It's called a stereotype. You're not just wrong, you're offensively wrong. The joke attempts to link Japanese people having squinted eyes to the brightness of nuclear explosions. That's beyond idiotic, it's harmful.