Because it's a bit straw mannish and shows an exceptional ignorance of physics.
The following is meant to be snarky:
1) Physicists measure energetic events in electron-volts for both mass and energy because by relativity they are equivalent (!!! Thanks, Albert!) and an electron-volt is not a fucking electrical unit, it is a unit of energy. If the guy who wrote this article had paid attention in freshman physics he would know that. In Quantum 101 one learns to measure almost everything in electron-volts; it simplifies all the equations. Of course, any good sophomore physics major already knows that.
2) Duh!!!! They give off X-rays because they are bombarded with all sorts of shit from the Sun. You'd emit X-rays, too. But of course, you'd be long dead by then so you'd probably not remember freshman physics and E&M week (electricity and magnetism, you'd better be up on your calculus). Best to take an astronomy course before deciding to perform a personal test of your theory of why comets give off X-rays. Maybe it's better to just measure a comet.
Or maybe the person who wrote this tripe should get a brain wash by sticking his head into the LHC main beam.
Yup! That would do it.