Avi K,
Not selling weapons to people because they might use them to commit crimes is a halacha. And ownership of wepons is certainly not a “right” in halacha.
גבול שמת בל יעברון בל ישובון לכסות הארץ is not speaking about immigration but about Hashem not bringing another mabul. That Hashem gave certain lands to some people in no way indicates that immigration is forbidden. Avraham was an immigrant in Canaan and the Yidden were refugees when they went to Egypt during the famine. Amon and Moav were faulted for not greeting B’nel Yisrael with food and water when they were coming into Eretz Yisroel from the Midbar. Sodom is punished because of their mistreatment of visitors. Etc.
Climate change is more a question of fact but the idea that people are supposed to protect the planet, l’avda v’l’shamra, comes from the Torah and there is certainly no Torah based reason to be skeptical. And yet, I find that frum Jews typically are skeptical of climate change.