Kind of weird to question one man's politics when the other party is the state of Qatar, famously known for their... Human rights. Also, they run PSG like a shit show.
The 2 biggest problems with United's debt is that it is United's neck on the line with it, and then United actually having to pay it. The debt being on Ineos' name sorts both out. Money doesn't have to go out of the club to pay it, because well that wouldn't make any business sense from their side. We are an asset. It is in their best interest to just run us properly so we appreciate in value over time, not to take some minor profits year to year.
My "fears" with Ineos/SJR apply to any owner ever - you don't know if they will make competent decisions, higher competent people. You can higher all the right people in football and things still go wrong sometimes. It's not easy, and a lot comes down to luck in the end, and especially the players ultimately just performing, the coach making good decisions, etc. They are wealthy enough to be the owners we need, United brings in enough money to be self sufficient, all they need to do is get things up to par after they've been neglected under the Glazers, and higher competent people and then stay ahead of the game in things behind the scenes. There is no way to know if an owner will be able to do any of that well or not, no matter how much money they have.
I can tell you for damn sure that I don't want to win by unlocking infinite money cheat, I don't want to buy success (it'll feel much less satisfying in the first place), I don't want to be the plaything of some oil rich billionaire or a political tool for some middle east and UK politics, I don't want United to represent the state of Qatar and all their archaic policies... Of course I'll still support United if they take over, but the success won't feel earned, and it'll be a little shame thing in the back of my mind while they are here ultimately.