Part of me gets where they're coming from, I think it's definitely a thing where some inexperienced cyclists on e-bikes ride dangerously at high speeds without having the cycling experience and technique to ride that fast.

However, just like I've had bad interactions with people on e-bikes, I've had bad interactions with roadies, people on BMX, cycle commuters, mountain bikers... I've also had super positive interactions with all of these groups. Generalizing e-bike riders as a whole based on the acts of a small number of people is silly and counter-productive. The more people ride bikes, the more cities have no choice but to accommodate them, which makes things better for everyone.