Where I live, it’s pretty common for non-cyclists, and even cyclists sometimes, to have no idea that the rules for pedestrians, cars, and cyclists are all different. Car drivers frequently believe that cyclists have to obey they same rules as cars, such as stopping at a stop sign, and get upset when cyclists don’t do this, without realizing that it’s the law; cars are required to stop and bicycles are not. (This is of course not true everywhere, but is where I live.)
I don’t know that there’s all that much ‘hatred’, my road rides are by and large peaceful, but the cars that do seem upset by cyclists tend to be unwilling to respect bikes that are following the rules of the road; they don’t like bikes using a full lane and they will often break the rules of the road to pass a cyclist unreasonably quickly and unreasonably close.
One thing I’ve noticed about e-bikes is that they are increasing the number of cyclists considerably. I feel like this is very very good for cyclists, it’s making bikes much more present on the road, increasing the city’s interest in maintaining bike paths, normalizing bikes in traffic for powered vehicle drivers, etc.