The Bible's veracity does not hinge on the question of a global flood, only a certain exegesis.
People sometimes get too tribal in their arguments causing them to take the position more aligned with their "side" than it is with common sense.
True that sentiment, but slight disagreement on the meaning of the word "exegesis". Perhaps you meant "eisegesis" instead. IMHO a truly exegesis reading (objective) of the Genesis text leaves open the possibility of the flood being a large region, not necessarily global.
I'm not saying the flood WASN'T global. I'm just saying the Bible text itself doesn't demand that interpretation. The Hebrew word "adamah" for the English world "earth" or "world" also has other literal definitions like "plot of land" or "region". The fact that the animals fit inside the ark suggests this. Another possibility: the flood was regional but wiped out mankind over all of the earth if it was done at a point in history before mankind had spread out from the Fertile Crescent. (Basically if everybody lived in one region then a regional flood would do the trick of wiping out man from the planet.)
Another possibility: God flooded the entire planet in such a supernatural way that we'll never find evidence telling us exactly how He did it. I tend not to lean that way on events in the Bible unless the Bible text itself describes it as miraculous. But it's possible God did it like that.