So. we could ask the Aliens technology, or Aliens wouldn't permit us to go interstellar ?
Star Trek Physics
You need a continuing source of huge amounts of negative energy to hold a wormhole open. I wonder if warp engines are enough to escape a black hole even after the event horizon? The enterprise should try going inside a black hole to see what happens.
This would likely not work. The gravitational power of black hole is enough to bend and disperse gamma rays and light rays.
I would deliberately do as much as I could to screw up the spacetime continuum if I went back to the past just to see what would happen
If for you didn’t like the outcome, you could go back even further to prevent what you did to mess it up!

I would deliberately do as much as I could to screw up the spacetime continuum if I went back to the past just to see what would happen
I don't think you could alter the supernatural means.
Id try, even jf it meant doing immoral things
Family guy made many an incest joke on the topic of back to the future!

I would do whatever was necessary to alter the past and create a paradox, just to see what would happen to the universe.
Time traveling could be possible but destroying space continuum would be prohibited by supernatural being.

How does a supernatural being even interact with the PHYSICAL world
Perhaps they will stop the time and the universe events were stop for the moment. It is like time out in a basket ball game. After they make a certain measure then the time will be proceed.
I think the wormhole mechanism is behave in the same way.

But how does a being outside of spacetime even interact with spacetime? How does a non-physical entity even affect a PHYSICAL world? Where's the integration point?
It appeared as a spontaneous emergence.
For the simple explanation is they are outside of our universe. While our universe half diameter could be 3600 light years away.
The angels need one day to travel from earth to heaven. They also visible to human if they want, the same as ghost too if they want.
Let's not forget SubSpace. If we can match their correct energy level domain, and concentrate enough tetrion particles in any given point, we can open up a door way to that dimension
What dimension ?