I assume any reference to Texas-sized objects is a euphemism; you just can't get any bigger that is tangible to the mind. I think that is what I've heard, or was it "it doesn't get any deeper" than in Texas, in lieu of "bigger".
[/cornjunktive]
Anyway, compare the volumes. Even if an impact took place in the belt, the volume inside the belt is 200,000,000,000 times more than the volume of the Earth. Although a splintered object might have at least two chances to hit the Earth as it is thrown back from the sun, these chances are still "slim and none". [This assumes a belt thickness of 1 million miles, though I could not find an established value. This number is much greater than Texas so it defys grasping.] There are other issues, of course, but maybe that helps a little.