... Are you saying that it's more or less ok to shoot people if you think you have a more or less good reason? This is acceptable?
Everything is fine. Don't change a thing.
It doesn't really matter what I am saying, it's the law. And it (the law) has nothing to do with police and guns. Police often get blamed for simply enforcing the law. You have a problem with the law, talk to politicians and legislators who pass it or interpret it (e.g., Supreme Court).
As for statistics, it is not whether it is accurate or not (and it often isn't). It is the interpretation of the stats that is the issue. You might quote numerous stats that blacks are disproportionally affected by the police, and those stats might be right, yet we will differ in what it means. You say it is racism, I say it is because blacks are disproportionally engaged in criminal activities.
Let see what Martin Luther King had to say about it in 1961:
“Do you know that Negroes are 10 percent of the population of St. Louis and are responsible for 58% of its crimes? We’ve got to face that. And we’ve got to do something about our moral standards,” Dr. Martin Luther King Jr. told a congregation in 1961. “We know that there are many things wrong in the white world, but there are many things wrong in the black world, too. We can’t keep on blaming the white man. There are things we must do for ourselves.”
One particular statistic in the link you provided is especially indicative of the deliberate and gross misuse of stats. They claim there is no correlation between crime levels in a city and police killings, presumably meant to mean that if the crime in a city is relatively low compared to the killings, that police department is more racists. Chicago is a good example of that misuse of comparing apples and oranges (or in statistical parlance, different pool of data). Most police killings happen in the South Side, notorious for ghettos and gangs. And yet they use the overall crime rate for the whole city of Chicago (and often include safe suburbs) to compare to. If you would compare apples to apples, you'd compare very high crime rates in the South Side with police killings there.
For what it is worth, Chicago until very recently had very strict gun-control laws...didn't prevent it from becoming the murder capital of the U.S.A.
And yes, I would like to change a lot. Just not the superficial symptoms, but the underlying causes, poverty and unemployment.