>>> But if it’s a supernova explosion, our Solar System could be showered with a big blast of X-ray and other radiation, which could be lethal to life on the Earth’s surface
No.
Since its rotational axis is not pointed toward the Earth, Betelgeuse’s supernova is unlikely to send a gamma ray burst in the direction of Earth large enough to damage ecosystems.[95] The flash of ultraviolet radiation from the explosion will likely be weaker than the ultraviolet output of the Sun.
I’m sure Karl Rove is working on a rotational axis readjuster as we speak.
That said, I’m wondering why a nearby system would not be in greater danger if it lay on a path perpendicular to the rotational axis. Obviously, my knowledge of astrophysics is limited.