Amazes me that Popular Mechanics used to be a (mildly sensationalist but sort of) decent magazine. Now, it's straight up ancient aliens and after-death experiences.
The headline is very obviously trying to reference Stargate without technically being false. That the article "explains" the headline doesn't make it any less shitty clickbait, in fact, that's the very definition of clickbait.
You're saying they intented to piss off easily triggered fans of a second rate 90ies sci-fi show? That would be hilarious, but I'm afraid you're giving Popular Mechanic too much credit.
It's only clickbait because of the general ignorance of the correct use of portal. If people actually knew and assumed that correct use of the word, instead of just for imaginary things like interdimensional alien technology or whatever, then it wouldn't be clickbait at all (though I'd still click, it's about ancient Egypt after all, and that's a fascinating subject)