You're going to kill someome

If this were true given the ratio of drivers of cars to cyclists there shouldn't be any cyclists left. So "you're going to kill someone" is simply not true.

I'm both a driver and a cyclist. If there is anything that will help cyclists then it's not a bunch of yelling and baseless scaremongering but a requirement that drivers put some time in on a bicylce as part of their driving examination, in traffic. That way they get to appreciate from a first person perspective what it is like to be totally unprotected while tons of steel are zooming around you.

As for cycling in the United States: Don't. The country just simply does not have the infrastructure to deal with the very few cyclists there are and the general mindset of drivers there places cyclists somewhere along the line of a target to hit (or a deer to avoid but which it is fine to squash otherwise).

One thing that would help America instantly would be to have a nationwide law that states that if you hit/injure/kill a cyclist you are automatically in the wrong, no matter what the situation. That would have the same effect on drivers as kryptonite has on superman.