Well it does have validity. A very small percent of scientists are persueing the big bang theory. Even Hawking won't completely stand behind the current theory, that's why he's working on the Grand Unifying Theory that he hopes may (theoretically) explain it better
Most say, "screw it, the universe is here and follows certain laws, let's figure out what we have now" (I'm paraphrasing)
In other words: Quit trying to shoehorn the Big Bang into other sciences like Evolution. Stay on topic! If your best argument for something is an argument against something unrelated you loose immediately.
Hovind tatics are unrecognized, unrelated, unsupported and imagined misplaced arguments or