Are these based on views of white or people of all races? Are there studies on the views of black people toward whites and toward law enforcement? We hear a lot of accusations of racism so it would apear that both sides judge the other unfairly.
I'm sure many people's views toward blacks and crime is based on the media representations (e.g. current images of looting and rioting) together with crime statistics that show that criminality among blacks is higher (violent crime).
Is it fair or not for people to have views and opinions that match the actual facts? It sounds like you think people should "not think blacks are more likely to commit violent crime even though they are". The only way to stop people believing things that are true is to change the reality - lower rates of crime. Do we really think that people turn to violent crime because strangers may be hesitant to approach them in the street?
Yes, people should be judged as individuals but when you are strangers you don't have that luxury and so skin color, clothing, behavior, speech etc... are all factors that we reach snap conclusions on.
What are you asking in your first statement? The point is not "demonizing whites"; black on black racism only WORSENS the issues. The problem is an endemic social one.
Looking further into the statistics shows that a) black crime directly follows the scale of poverty/class with crime (ie. black people are disproportionately living in poverty, so they can be disproportionately skewed in criminal representation), and b) the statistics are also skewed by ARRESTS and CONVICTIONS, of which black people hugely receive more of, with the same crimes and even lesser criminal references as others. I cited multiple sources which reference those stats directly.
I've studied people's psychology for years; I agree with you that people are very weak to self selection bias, snap social judgments, etc., all for probably obvious evolutionary issues.
The response is not "it's white people's fault," it's that situations like this are directly a result of the social situations that exist based on the United States' history. If you take any large group of people, given them a snap visual identifier, and similar history, things like this will happen. Blaming people as a whole for what people will obviously do doesn't accomplish anything. However, blaming the media for things like disproportionate representation (see links) DOES do something, as it actually helps to change public opinion, which helps mitigate these problems over time.
The only real contention I have with this thread is when people say things like "what happened two or even five generations ago shouldn't matter with a current individual" as that directly goes against everything learned in two entire branches of science.