Our genetics probably won't die out. (There are a lot of us, and we're pretty resilient as a species.) But our culture? Our ideas, stories, values, history, even our technology stack? Those seem likely to be far more fragile that mere survival. I think "could be disruption" is selling it short - as a species, we've invested thousands of years into a particular pattern of fairly stable climate. Now, we're going to see that pattern change and simultaneously become less stable.
I don't think collapse of modern civilization within the next century is guaranteed, but it seems a dangerous level of possible.
They also did nothing right. Their stunt is 100% useless.
> We desperately need more attention on climate change or the human race will die out.
Yah, that's not even remotely true. Who is making you think that?
There could be disruption, people will have to change what is farmed where, people might need to move, animals will have different ranges.
But human race die out? Not in the slightest.