Why do people say illegals should go back to where they came from and is it a matter of racism?

https://thelemmy.club/post/46067918

Native Dutch, fluent English, flhent German and French, I can carry a conversation in Spanish and Italian, and some baby steps in Japanese.
The Dutch are so dope, I feel every Dutch person knows like at least 5 languages
Some of the Scandinavians too! Like I knew a guy (wasn’t born in Sweden) but moved at a young age and was born in Poland. He speaks Swedish, English, Polish, and probably more
It’s easier for them to reach higher education, because they’re so tall.