How do other flat Earthers feel about this incident?
They don't think about it. They don't want to live in a world where either people are killed in pursuit of an unreachable goal, or in a world where the government kills people to keep up their space conspiracy.
Can you please quit posting nonsense in the upper fora? You clearly have no understanding of FET, or the motives of its supporters. You are making up some random opinion on a question that wasn't directed at you.
In some sense, Rekt is correct. I think this is backed up by the lack of posts and replies to this topic. Apathy is a clear winner.