Why do american shooters keep targeting civilians and not politicians?

Because they're not politically motivated.

Because they’re angry at society as a whole. The first available target is as good as any and civilians are far easier to enact one’s revenge fantasies upon than a head of state.

I guess the civilians are a much easier target, how far would an incel get into a govenrment building eh?

When glowies learn about plans to shoot a politician, they prevent it.
When glowies learn about plans to shoot up a school, they let it happen so they can ask for more funding.

Because most aren't ideological, they just want to write their name in history.
Breivik was different, he was ideological but he shot wealthy politician's kids to intentionally get his message to the politicians themselves.

Because politicians have security and are actually hard to kill. Life is not some zogbot action movie.

Why would mossad shoot their own people?

Because they are manchurian candidates of the globalist elites?

The security is a joke.

Too many big nosed people and other crazy subhumans.

exposeintelligence.blogspot.com/2017/03/going-after-political-dissidents.html