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I remember that the Queen didn't permit gay staff members to bring their partners into their workplace until 1995, and she also had something against people with AIDs. There's a lot of other problematic things the Queen has done but those are the ones that came into my head.
Extra controversal opinion and rant: Making fun of Queen Elizabeth's demise is disrespectful.
I mean, it's fine if you hate the queen and her actions. Heck even I'm disgusted by some of the Queen's actions. But to say stuff like, "Haha the queen died." and making memes about the Queen's death isn't alright. In fact, it's disrespectful and disgusting.