What claim is sampson making about himself and anyone from the rival house of montague?

That not a solitary Montague can make him to go to the "weaker" side of the wall.

The House of Montague in Romeo and Juliet is one of "fair Verona's" two fighting families –the House of Capulet is the other rival. Montague's child, Romeo, falls for the girl of Capulet and they run off much to the outrage of their particular families.

answer; ///he could not explain why the continents drifted;