I wish I was surprised about how much hatred is being expressed towards 'them'.
However, having worked for an organisation supporting refugees a number of years ago, I'm not. I have worked for a number of charities, often in the children/families or disabilities sector. If I told people what I did they tended to think I was a little bit saintly (haha!)
Then I took a job in this organisation supporting refugees. When people I met socially heard where I worked I faced such hostility and hatred it amazed me. It wasn't just a disagreement about a government policy that can be discussed, and agree to disagree if necessary. Such anger and hatred. If I quoted statistics I was told they were lies - not any informed critique of how the numbers were compiled, which would have been completely reasonable, but anything that challenged the 'I know this because I believe it' was simply dismissed as lies.
Scary stuff. Especially when you compare language (and newspaper headlines) that were used in the 1930s to describe the German Jews trying to escape the Nazi regime - swarms, 'us' being 'over-run' and 'flooded'...
I remember reading a book by an Afrikaans academic and journalist about growing up in apartheid South Africa. He grew up 'knowing' that the British but powdered glass in the food they gave to the Afrikaaner women and children they corralled into concentration camps. As an adult, he looked at the evidence and realised that this was a fabrication (there was a massive death rate because even the basics of sanitation such as soap were scarce, and the British authorities didn't care) - but it was uncritically accepted by everyone around him as 'everyone knows' as a child.
I think of it whenever I read threads like this, when so many people 'know' that the 'swarm' are criminals, are benefit tourists, are scum of the earth etc.