Yabut, what about "concerned"....or "outraged"?
I think we have to ask Sir Bagster what the rankings are on those various emotional states.
My own would be . . .
concerned
appalled
outraged
My reasoning is . . . concerned is polite and low key--usually and certainly compared to the other 2.
Appalled is like shockingly aghast--hyper-incredulous-ity.
Outrage has tons of high energy anger and is aggressively focused on the source triggering the outrage.