One of the ideas in the theory of government is that it exists to have a monopoly on violence and so forth. It's murder if you do it once, it's not if the state does it a few hundred thousand times.
To an extent, police abusing power and inducing fear in the populace is "working as intended" if it keeps the state in power. But our ideals tend to be such that we think the state should function with greater respect for human rights and individual freedoms.
Also, these wahoos are just a bunch of loose cannons. It's embarrassing the state, not serving it.
Human rights and individual freedoms are not just ideals. They are crucial checks which insure that the government doesn't go "rogue" and abuses the power it's been given.
To an extent, police abusing power and inducing fear in the populace is "working as intended" if it keeps the state in power. But our ideals tend to be such that we think the state should function with greater respect for human rights and individual freedoms.
Also, these wahoos are just a bunch of loose cannons. It's embarrassing the state, not serving it.