The person he replied to wrote:

|You're a danger to the world we live in.

The above person is saying he threatens the world, and as a resident of such world, is also being threatened.

"You're a danger to the world we live in." is not pointing out useful information.

You don't need to say "I feel threatened". Who the hell says "I feel threatened"? The fact that there is so much anger and gnashing of teeth is evidence that a worldview that does not include AGW must be viciously and immediately attacked. I find that fascinating.

By "I find that fascinating," do you mean "I interpret that as meaning people who believe in anthropogenic global climate change are closed minded and unwilling to entertain opposing viewpoints"? Because if so, that's not at all what's happening here. What's happening is that people are unwilling to devote an hour of their time to an untrustworthy actor peddling a viewpoint that is heavily pushed by those who have the most to lose from a global switch away from fossil fuels. There are so many reasons not to bother watching this video, and the best reason you can come up with is "it's interesting".

People feel threatened because people like you are the reason our planet may well be unable to support global civilization in the near future.

Anger? No, just tired of the same old debunked denyalist bullshit claims