Well, I'm sure that must depend on what the meaning of "black hole" is. But in any case, I don't find "religious warfare" to be conducive to the practice of science --even when one "odd ball" is ganged upon by those who adhere to oft adjusted "conventional wisdom."
The fact of the matter is that the guy is flat-out wrong, and easily shown to be so. The only things a competent scientist can do is debunk him or ignore him. There's no third option. Which would you prefer? You've complained about both.