Einstein you can't say there are no facts. Here is the science opinion summary :
The first Black hole observation were Cygnus X1, 1965. They say now they clearly identified it...
Quasar are
QUAsi-Stellar Astronomical Radiosource. The consensus is that they are the compact extreme lighting region around a supermassive black hole at the center of a massive galaxy.
The white holes are speculative, they describe it as the opposite of a black hole.
As you can't get out of a black hole (can be called the future as you can't go back in time), you won't be able to stay or get in in a white hole (can be called the past).
The limits of these singularities are called horizons. And while one is repulsive the other one is attractive.
The problem in the Schwarzschild white hole theory is that the configuration is supposed to be static and we do not know black hole otherway than by massive stars implosion. It does not exist in eternity so the white hole could not exist.
But this position is to me really strange.
It means there is no physical process able to explain it's formation. But you know black holes so why couldn't this be the origin of whites ?
Also they say Quasar are acceleration discs so they can't be whites holes.
But Quasar origins are often young stars and they deliver a lot of energy