> > Will my kids be an ethnic minority in their own country in the next generation - and if so, what's that going to be like for them?

> What about this is an essential concern for you? Like, what are the potential harms?

European countries take great care in maintaining and strengthening their traditions and cultural heritage. That would be at risk. Now, whether or not that actually matters or not is debatable, but Europeans DO seem to care to keep their cultures and traditions alive.

He knows how white Americans treat minorities

I think there are very few countries that can claim to have a good setup for an ethnic minority. Singapore, US, Israel, western Europe. Most of the world - being an ethnic minority sucks. As western Europe changes the ethnic western Europeans may not enjoy their treatment.

To racists, people who look different are inherently harmful. Racists are terrible.