> imagine if all of India moved to Germany. What would happen?
Indian & East-Asian immigrants have much lower violence stats than the native populations. To that end, your example doesn't say much about the GP that you're replying to.
To steel man the GP, let's say they mean any 2 demographics, not German vs Indians specifically. But there in lies the core issue with immigrant conversations. You can't pick 'any 2 demographics'.
Different immigrant groups (grouped by nation/age/gender/religion/skill-level) demonstrate different integration characterisitics. All immigrant conversations should be painfully specific. The conversations will be politically insensitive. But this is a comment thread about Trump winning his 2nd term in office. So, clearly, the ship has already sailed on political correctness.