I am not an activist, and this is not a manifesto. I don't understand why you brought that up.

Anyways:

The fact that most modern countries have police is not evidence that police departments are necessary.

In addition, the article is about the American police, which are notorious for their history of racial profiling, cover-ups, and numbers of civilian shooting deaths every year. Does most modern countries having police mean this is justified behavior?

If you could, please provide a link to a survey or study indicating that people who live in "high-crime" areas want more police.

And even if they did, that doesn't change the reason for the widespread backlash against police in the United States. It's not simply people "demonizing" a profession (which again, people choose to work in).