There’s a meme that I’m particularly fond of that I can’t find at the moment . It goes along the lines of -
There is a plate with 20 cookies on it, the banker takes 19 and points at the 20th and says ‘Oh look the immigrant is trying to steal your cookie’
People are more important than borders or countries. Borders are used by the wealthy to protect their wealth and to arbitrage taxes and currencies. People are following wealth and escaping the destitution caused by the theft of their nations wealth by those accumulating it in the ‘developed’ countries (and I include those of their own countrypeople who stole their wealth and stashed it in our banks)
The problem is not immigration - it is inequality.