That is not how they see it. They see Biden or Harris as the man or woman in the dog park who doesn't restrain their pit bull from attacking and killing the much smaller Shih Tzu. They do not blame the pit bull (Netanyahu), which does what pit bulls will do. They blame the perceived person who controls the pit bull. Biden, and now Harris. That is why they are there. The Democrats are those who hold the power over this situation.
It's actually the BBC who compared the situation with 1968- not me. The common factors are war and Chicago. I do not believe the police will react the same way, but the protesters in 2024 can be expected to behave much more aggressively than their 1968 counterparts, whose biggest sin was mainly to try and lower the American flag. The 2024 protesters are out to get attention and provoke a response from the Chicago police. What the response will be, we will need to wait and see. The protest agenda will be to disrupt, and create an atmosphere of chaos. Cops do not like being egged or bullied any more than anyone else.
I believe they may even follow the blueprint laid by the Ottawa trucker protest. At least to some extent.