Whoah whoah WHOAH stop.
Black holes are kefira? Howzzat? They have been scientifically proven to be possible by Einstein and Hawking was actually the one to theorize a way to see them, which was eventually proven when telescopes picked up on Hawking radiation located in regions of space where the gravitational movement of planets predicted there to be black holes.
What else is kefira just because you didn’t see it with your own two eyes? Amoeba? Pluto? Otto Von Bismark?
As for those questioning his contribution to “practical science”, Einstein’s theories of relativity were purely theoretical until decades after his death when it became crucial to designing the satellites that give us GPS. Number Theory was one of the oldest studies in mathematics and for thousands of years people tried to find use for it, until three Israelis named Rivest, Shamir, and Adleman along with two Brits named Diffie and Hellman simultaneously came up with cryptographical mechanisms that can be used to transmit data securely.
Sure we may not have a device that can utilize Hawkings studies in quantum entanglement, nor do our computers need to understand how information is lost across an event horizon. But maybe one day… Or do you just prefer that scientific progress stop right here and now because Yankele Schmendrick with his BA who can’t tell a quark from a quasar doesn’t think it’s worth it?