That's an extremely inaccurate portrayal what has taken place. No liberal brought up Kamala's sexual history. Find me a post where a liberal was like "let's talk about Kamala's sex life." No, in fact the left-leaners were only defending her after your buddy started calling her a whore -- attributing all of her accomplishments to sleeping around -- and refusing to address her by name ("that woman"). This is typical victim blaming. Only react to the defense, not the perpetrator. This is classical Trumpian victim-blaming mentality. Zero personal accountability.
As far as the links you shared,
The following is a quote from the first link:
https://abcnews.go.com/US/police-gunman-shot-moving-patrol-car-times/story?id=73042356
The following is a quote from the second link:
https://www.bbc.com/news/world-us-canada-54137838
For the remaining three links, they are from 2018 and beyond so clearly under Trump's watch. It's pretty ass backwards to blame a future Biden presidency on something that happened in 2016-2018 under Trump's watch.
Specifically, what part of Biden's plan is going to lead to more of these? Is he calling for a defunding of the police? Is there any evidence that Biden is anti-police? At worst, what will happen if Biden wins is more of the same relationship between civilians and police, but with a less incendiary leader, cooling things down a little.
Also, when you say this is a preview of Biden's America, you are implicitly insinuating that the alternative is better. Otherwise, you would have said "this is Trump's America."