(quote)
"The problem with the USA is that its society is divisive and tribal....If more people voted for substance, instead of political parties, the problem would be solved quickly. "

Oh, beg pardon.
And what nation's culture , 1st in casting stones in complete "innocence", are you annonymously pontificating from or is pontificating from behind a "safe" cloak of annonymity spare your position the same scrutiny you express solving our problems with violence as *if* the true solution had anything to 1st dowith politics at all.

BTW: I doubt you can name any nation's culture that doesn't have that all too human memory of tribalism and actions espressing it. Say at Soccer ( football ) matches fr'instance. ;-)