Why are LoL players so hostile against Heroes of the Storm players?
I've seen LoL players say nothing but negative things about HotS, like how it's a "noob moba game" or how it's "no skill" or "no fun". HotS does requires skills, just different kind of skills. It requires you to cooperate and help other teammates, rather than trying to score a 20/0 with your overfed ADC. There's way more emphasis on objective control and pushing strategies in HotS, whereas in LoL getting dragon or baron is considered an afterthought.
You also get unique heroes like Murky, Abathur, Cho'Gall, or The Lost Vikings that would probably be deemed "too cancerous" for LoL, resulting in the game to be full of mostly generic champions.