While there are of course people with personal and familial histories tied to British colonial rule who could be understandably unmoved by her passing because of who she represents to them*, the vast majority of the hateful reactions I saw were from people completely ignorant of history and without a personal connection, jumping on the hate bandwagon. The outright fabrications about what she's done were amazing, you'd think she had personally colonized the world, implemented apartheid, and enslaved millions. There were photos of Wallis Simpson greeting Hitler and such being circulated and mislabeled as Elizabeth instead of Wallis. And they were getting *lots* of traction. Nearly every young, white, left-leaning person I know was quick to lecture everyone else on social media as to why she shouldn't be mourned. It's just ridiculous.
* I've also seen people from those very places who loved Elizabeth and viewed her as a maternal figure, so I'm not saying this is a universal reaction