Outside of exposure-related deaths, cold means shorter growing seasons which means lower crop yield. This equates to hunger and eventual starvation. Cold is far more destructive than heat by and large.
You can’t blame children for being scared about the environment... However, when you turn 34 and you live through 34 years of failed predictions and you realize that the world is still standing and not even trending towards oblivion, you would think that you could let up and live life a little...