Oh my, sorry that I can't help you but - LQBTQ+ AND freakin' christian? I'd say that this is a troll account, but it seems that this "dude" apparently means it, or he has waaaay too much time in his momma's cellar.
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Do you get an error when trying to block? Or does it block them yet you continue to see their posts? Iirc they have a couple accounts on different instances.
The fediverse doesn't let bot accounts block people
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