Is a cancerous tumour not a threat to life?

Oh it's definitely a threat, and the damage is not potential but factual already. Consider 120+ children dead in a single airstrike on a school in Iran, or the current gasoline prices worldwide as a result of the unprovoked war they started. People killed, world economy damage, plus the damage to international alliances, institutions, and the rule of law. Just quick 3 examples of the actual damage, and that's only this year!

They're threatening multiple countries, sovereign territories and invaded/attacked two countries in a matter of 1 year.

If this is not a "threat", then what is your definition of one? If anything you could argue this is a step ABOVE threat, since US no longer threats like e.g. North Korea does, but it actively acts as a bully on a world-wide stage.

I've lived in the US for many years and while I appreciate my time there, I can definitely say that as of today, the US is the actual cancer of the world.