You’re accusing others of extremism in the same breath as you make one of the silliest slippery slope arguments I’ve come across. You think those who choose not to have children due to climate concerns are sitting back, over consuming resources, and thinking they’ve done enough? That’s not an extreme assumption?
Be careful, you’re treading awfully close to hypocrisy.
I sincerely feel sad for you that the concepts of a broad sense of empathy and deep connections with others who don’t share half your DNA seem like such difficult mental exercises, and that you assume those who choose not to act against their values are somehow less moral or caring about society. I don’t know who failed you, but it was certainly someone important.