Yes, why not? I could imagine calls like these leading to hurting police personals. These personals are not only people (and therefore part of society, that democracy should protect), but they're also part of the law enforcement system, which is kinda crucial for, well, any society. Do we disagree?

I'm not from the US, so I might be missing your point, but if you're referring to neutrality around free speech then I guess the answer is yes? I'm not sure where you're heading though. I do think this is a very complicated issue, and drawing the line is hard and often contextual. But at the same time I feel quite certain that a line must be drawn.

Would make the hate go away - probably not. But in the country I grew up, for example, we had a prime minister assassinated in the 90s, and I think that many would agree that it was the calls in protests and the kind of symbols that were used that created the ground on which a political assassination could happen.