Thiel has 2 real fears and he's been pretty consistently worrying about them.
- His own mortality terrifies him
- He's convinced that an apocalyptic end to the USA as we know it is coming any day now.
A proletariat uprising would be apocalyptic in his view AND he would undoubtedly get the Mao special if one happened.
There's 0 chance of one because Americans are way too divided but this killing is the biggest source of existential dread for him and he's probably been waking up with nightmares about it.
Couldn't happen to a nicer guy