Many people overestimate the percentage of immigrants in their country
ourworldindata.org
ourworldindata.org
Go to somewhere like Bradford or Birmingham in the UK, I'm sure vast majority of people there are born in Britain, yet some people would call all of them "immigrants" regardless.
Small towns are hit the hardest, but even large cities are not immune to sudden, rapid population fluctuations and the strain this puts on local resources (just look at New York).
The history of the Irish in the United States serves as an excellent example. Driven by the Potato Famine, they poured into the US in massive numbers. When too many people from unrelated cultures arrive too quickly, conflict becomes inevitable.
Add 10 to 20 million people over a four-year period, and you have a perfect storm for conflict.
This chart isn't broken down by ethnicity but it will do in a pinch. https://www.visualcapitalist.com/worlds-7-5-billion-people-c...
2) Dont trust everything you read on the internet. A lot of it is skewed by personal biases.
I suspect why this is overestimated has a lot to do with media treatment. Different people than you moving in is scary to people, scary things get engagement, engagement gets eyeballs in front of ads. I don't know how to measure this though because this model is so ubiquitous, where would you find a control?
But who cares what poor people think though, right? lol