You mentioned once, in a previous class, that ETs were responsible for promoting the Cold War between the USA and Russia? That they wanted a nuclear war to happen? Why would they do that?
The ET situation is very complex, given that there are benevolent and hostile races involved from multiple dimensions. To answer your question:
• The hostile ones are more physical and would firstly not mind if humanity wiped itself out, since they’d like to inhabit the Earth.
• Secondly, the more physical ETs can live in radioactivity and humanity can’t. A nuclear war would make the world so radioactive that it’s a fitting habitat for them, but not for us.
• As demonstrated in the war between Mars and the now-destroyed planet Tiamat, a massive explosion can strip a planet of its atmosphere. Massive and multiple nuclear explosions would strip the Earth of its atmosphere. They find oxygen toxic, we need oxygen.