In Rio de Janeiro happened something like this. An old woman and a children were walking on the bike lane and an ebike crashed to them and killed the old woman. A city councilperson hurried up to make a law banning e-bikes from bike lanes, saying that they should use the car infrastructure, but the Mayor vetoed the project.
This isn't particularly plausible. Searching for news about it, I see stories about a collapsing bike lane and a story about an ebike operator being killed by a truck (this woman was Brazilian but the accident happened in Ireland). Nothing about an ebike killing someone else.
They don't really go that fast. Anyone can be knocked over and killed by basically any vehicle (including a regular bike) if you land incorrectly, but ebikes are about as dangerous as regular bikes to pedestrians.
You really can't say that, categorically. Part of the issue is that when people speak about e-bikes, there is a huge range of vehicles that fall under that category. You have ebikes that hit 80mph these days, yet generally are sold no differently in terms of registration or licensing than a pedal assist bike that cuts out the engine at 20mph or if the rider stops pedaling. A lot of these delivery drivers in NYC are riding illegal electric mopeds that go at high speeds and weigh much more than a normal bike, but are sold as though they were equal to an e-bike that goes much slower.
Even a lighter e-bike, like a Citi Bike, weighs about 45lbs. That's 15lbs heavier than my regular bike, which will make a difference if you get hit at higher speeds. Something like the Surron bike mentioned in that video is advertized as street legal, but according to their specs page, their bikes clock in at 47 kg, or 103.6 lbs! Sure, that guy could be riding a slightly different model, but there is an absolutely massive difference for a pedestrian between getting hit by a 150 lbs rider on a 30 lbs bike doing 20 mph, and getting hit by the same rider on a bike that's three times as heavy and going at four times the speed. Heck, there's a big difference for the rider themselves if they just eat it on their own.