What? Where have you been that you have this kind of opinion? It's basically the same as reddit: You do have your bubbles, you do have open minded communities, you also have closed minded communities. Your experience is therefore dependend on where you go.
For example: Joining a vegan server to say "meat is great" will lead to a shitshow. But that's not supprising and it's not because Lemmy per se harbors militant people.
Afterlife
I think nobody mentioned it yet. It's about someone who lost the love of his life, so the show is about those emotions and the struggle to continue. It's quite sad sometimes, but the show also has a lot of humour and I laughed my ass off multiple times.
Why watch a show about such a sad circumstance? I think we all lost someone or will lose very important persons / friends someday and it's important to learn how to deal with that and how it's important to continue. I can't emphasize that enough