The Saudi student visa program and funnel for passports would have let these men pass through.
I believe they were a collection of various nationalities: Saudi, Yemmeni and Iraqi. Hence the ‘teams.’ Someone also knows the money trail. There’s your payor.
Some large-ish percentage of these H-1Bs are from countries known to be hostile to The American Way.
Some fraction of them are actually pre-placed assassins or saboteurs.
We are putting them inside every key factory, power plant, refinery, water works, and sewage treatment facility in the country.
One Perfect Day everything will collapse at once.
Do be prepared.