Probably because any "skepticism" about climate change (no matter how reasonable) is basically taboo (cancelable offense) which triggers knee-jerk opposition in reactionary/contrarian types.
Happens with other topics, like transgender treatment for kids.
It's also amplified by the humiliation many kids experience when struggling in school systems. Causes a general distaste for reason and science because, in a very real way, it hurt them as a child. Not actually science and reason itself, but people pushing it and claiming to represent it.
Happens with other topics, like transgender treatment for kids.