In my locale, they are more like small motorcycles without brakes.

Actually, most of the e-cyclists are quite well behaved, but there does seem to be a tendency among the beginners to maneuver through things at speed, that a conventional cyclist would slow down for. My guess is they haven't developed a sense for how far ahead of themselves they actually need to be paying attention.

But also, I admit that there's a certain bias here. There are fast and slow cyclists, and those who are polite or jerks. You don't notice the polite cyclists at all. You don't notice the slow jerks, because they're behind you. You only notice the fast jerks, on either electric or conventional bikes. So there's a bias towards thinking that fast riders are jerks.