I hate to go all armchair psychologist but I do work in psychiatry and classifying people as either all good or all bad is a textbook personality disorder trait. Its called "splitting". Its the inability to hold opposing thoughts, feelings or beliefs. So, if a person makes a mistake, they are instantly EVIL and wrong and forever tainted. Their whole character is painted as "bad". Similarly, when someone does something good, they are sanctified and sainted as perfect/angelic and someone who can do no wrong. There is a complete inability to recognise shades of grey and the complexities and flaws of the human character. Very, very few people are all bad or all good- we are all a mixture of traits and we all make mistakes. We are all flawed.
But people who split, are unable to recognise this so they categorise people into the evil category or the good category. Its classic dementor behaviour and its a glaring sign that someone really is unable to regulate their emotional responses.
Hence: Italy = Perfect, good, angelic
UK= evil, bad, wrong
They did the same thing with Sweden- when Sweden adopted herd immunity it was considered brilliant and sensible.
When we considered it, it was murder and evil.
You cannot debate with them, they are literally incapable of seeing it through any other lens or in any other way.