An eruption would have all sorts of interesting climate impacts affecting literally everyone on Earth. Not sure how that relates to the End Times,...
FYI: "End Times" predictions tend to include many 'natural' disasters as an indicator that we are "in the zone" (so to speak)
The relatively large number of 'incidents' (i.e. hurricanes, tornadoes, wildfires, earthquakes, etc) since the turn of the century tends to strengthen the fear and/or joy that we are nearing the end.
Of course, those ideas are not rational, correct?
I wouldn't call it irrational if its consistent with their beliefs which I won't bother judging right now.
So - we have tracked payments with BTC (everyone has an ID), and I'm still surprised I haven't heard too much Evangelical pants-pissing over that. If it's accepted by a government and required to buy certain things (the latter's already true), that'd fit with end times.
Natural disasters... my grandpa's a preacher who doesn't generally do fire & brimstone, but occasionally had guest preachers who'd go on about that, so I'm trying to go by memory... I don't recall anything about "a high number of general natural disasters" being related - but specific ones. IIRC, one of the key indicators is supposed to be a rising of water levels, which we obviously have and are going to continue to have as polar ice melts into the oceans..... "Sinfulness" is pretty high -- Christianity is dying out in the US and most of Europe to a "loud and proud" non-religious group. A couple of the Israel puzzle pieces are in place, but it's still waayyy off from being put together and is almost guaranteed not to happen in our lifetime (Israel being invaded by super-powers and converting to Christianity, which really makes no sense because post-industrial countries don't generally have leaders who can just say, "okay, we're a Christian nation, now - submit or die," and the idea of Zionist-filled Israel's Jews willfully converting to Christianity is ridiculous). There's some trouble in trying to predict the Rapture because a lot of the book goes on telling about all the terrible natural and anthropogenic disasters AFTER it. You know - if you don't want locusts, weird&giant&toxic meteors that poison the global water supply, world war, and ultra-authoritarian governments guillotining you if you don't reject Jesus and submit to some falsely-divine autocrat, you damn well better accept Jesus BEFORE all these bad things happen.
To back-peddle and go back to your question just a bit - focusing on Israel is goofy to me... Israel's tiny and, frankly, relatively insignificant compared to areas Jews of ~1BC had no knowledge of, and places I guess neither God nor Jesus decided was worth revealing Himself to, even though they make up the majority of Earth's population. Judaism and Christianity were very, very limited in the geographical areas they spread to - basically only places Europeans (and whatever the proper term for Middle-Easterners is) invaded or traded with. Everywhere "discovered" by Europeans had to be converted from Pagan religions, which seems to pretty clearly (IMO) disprove either as being the "true religion." What kind of asshole God decides to have entire continents of peoples, for thousands of years, never have a chance to accept Him as their God? Pre-colonial natives aren't going to look at a passionflower and say, "oh, yeah, I guess Jesus must've put that there to represent his betrayal and crucifixion - guess I ought to convert." Then there're a good few stories in the Bible which are crystal-clear BS -- Noah's Ark being the most ridiculous simply because there are animals exclusive to continents Jews/Christians hadn't even discovered, which've clearly existed for tens of thousands of years, so unless the continents split apart AFTER Noah, the story's nonsense or, at least, there was really no reason for Noah - who, biblically, was a drunk (I've repeatedly heard Noah was the first to DISCOVER WINE, because nobody ate fermented fruit prior to Noah -- some Jews actually blame Satan for poisoning Noah by injecting fruit with animal blood
) - to stuff a breeding pair of the 2-6 million different species (factoring out animals okay with living in water, maybe around 1-2M) of animals onto some type of unreasonably large vessel he'd need the net worth of perhaps $50-$500M in today's dollars to commission (keeping in mind the unreasonable amount of materials he needs in a short time and that it's still the largest boat ever to be made of wood, by individual or government). The Bible doesn't say what Noah did before - maybe a preacher - so I guess he must've been one of those off-the-highway mega-church preachers with a money-changing office (or maybe God prefaced the water flood with a flood of gold coins).