My guess is it mainly are those that do not live right, along with those that keep their heads in the sand until someone comes and sticks a TNT stick up their butt!
Who is terrified of our impending doom?
Because its near
me.

"Impending doom" ?!? Nope. That's now how reality here in the real world really works.
You're not the first person to waste your time feeling that way and you won't be the last.
Proof of that is plain as day to people who take the time to learn it:
I am not "terrified" of much...I have been hearing about impending "doom" since the "50s...live one day at the time and enjoy what time you have on earth...that is my philosophy.
Build that shelter deep underground...I'll drive to the park and enjoy the day. Wonder what all the people did with the food and water they stockpiled in 1999?
No.
Because it's never going to happen.
Because its near