AV1611VET is apparently sincere as a young-earth creationist, but this bit does read like he's taking the piss at someone.
But it also serves another purpose--it helps slam home the fact that, ultimately, he doesn't give a shit one way or another another about any physical problems someone else sees with the biblical Great Flood--or anything else in the Bible, for that matter. He doesn't care that it's physically impossible, he doesn't care that it's biological impossible or geologically impossible, if you present him with evidence, he'll laugh and tell you, "Yeah, so what?" If you see the problems, as far as he's concerned, the problem lies with you, not him, the Deluge or the Old Testament. And if you point them out to him and ask him for an explanation, he's likely to give you a flip, amusing, off-the-cuff answer just like this, because he thinks it's very funny and very strange that you do. And it's clear to him that the only possible reason you do is because (1) you're astoundingly ignorant, or (2) you're trying to punch holes in the truth because you're deluding yourself. As his sig says, "God did it--case closed," and who gives a damn how it was done, or why, or why it now looks like something else altogether? It's not important to him.
In AV1611VET's world, if the Flood required the laws of reality to be completely suspended for the duration, then that's just what happened. If it required God shuffling around parts of continents in hours or days like a deck of cards, then that's what happened. If it required something like flying unicorns to give birth to tree sloths and aardvarks to explain their positions today, then that's exactly what happened. Because He's God, and He can do whatever He wants when he wants, period, end of discussion, full stop. And fuck you if you think it sounds insane--the insane one is you. And he would like to see science brought down to that level. He honestly believes that this will improve science since he doesn't link "technology" and "medicine" with "science" in the same way most of the rest of the world does. And even if it didn't, even if it did the same thing to science and technology that throwing a bag of powdered glass into a jet engine does, he still wouldn't give a shit about it--people did without most aspects of technology and medicine for thousands of years, as far as he's concerned, and it wouldn't be a problem if they had to again. If misery, starvation, ignorance and pain drove people back through the doors of the churches in throngs, it would all be worth it in the end.
So take a good long hard look at him--he's a member of a haphazard movement that is determined to drag humanity through the door to another Dark Age, then lock the door behind them, bust the key off in the lock and weld the door shut.