There are lots of threats to all human beings on the planet. You are simply taking the view that the thing you personally see as the biggest threat is therefore the thing that everyone else should see as the biggest threat (they won't) and agree with your view (they will not), casting your view of the world as the single truth (it isn't), then further presenting it in a ultimatum-based combative manner, asserting that other people take action based on your narrow definition (they won't).
This prevents any reasonable discourse so is unlikely to be successful, no matter how dogmatically or assertively you present your case. Others will simply perceive it as unreasonable, I suspect.
This doesn't mean that you can't still believe it to be true - it just means that others will not engage with the points you mention, and you'll then end up being more isolated and frustrated.