An eye for an eye doesn't solve anything unless it is the ultimately last possible solution.

Violence is the most effective, and often the only, way to solve violence. Imagine if nobody fought against Germany in WWI or WWII.

and mainly the black population.

This is part of the problem on several levels. First, let's be honest: most people don't care about the poor black population. When black people get so outraged at police brutality that they riot, cops literally start shutting out and shooting journalists; and even then it's often reported that the black people are the problem. They may be misguided when they throw a brick through the window of some random shop, but they're not wrong in linking that shop to the corruption. That shop owner didn't do a damn thing to stop it, and kept paying the taxes that fueled the cop's salary.

Second: cops kill more white people than black people. It's not a race issue, and i'd love it if people stopped painting it as one. It's a Police State issue. More black people tend to be poor than white people, but there are more poor white people than there are poor black people. I'm not quite sure what it is yet, but at first glance it seems like class warfare.

Instead we should grow louder and more widespread throughout the nation with our pleas.

People who protest against the cops get arrest at the fucking protest. They are monitored. They are put in central databanks and posted on local police boards. They are harassed to no end.

I say that ignoring the fact that police power is growing. The laws and the Supreme Court are decisively in favor of cops being allowed to do whatever they feel like. The people who write laws, and monitor them, are not on our side.

Becoming violent does nothing but allow the other side to escalate more and depict us as the "bad guys" and as much as you like to call the cops the bad guys the world we live in is to grey to be that black-and-white.

That's only true if you don't accomplish anything. It would require a sustained effort, and in this environment of expanded cop power in the face of nearly no cop prosecution i don't think it would be too difficult for a cop killer to be seen as a hero. The media would absolutely call them a 'terrorist', but that's because they're there to promote whatever the government wants.

I think if someone showed up tomorrow and simply started killing cops that he or she would find a parade waiting for them when they're done.

However this is not the time to retaliate.

This is exactly the time.