Which is nice and all, but not germane to this discussion.
Masada means more to Israel than a mere historical site. As
@240B said, the Red Boots run up the side for graduation - but it's what happens after they have reached the top that really counts.
Trump was invited to Masada. It was a test. He failed. Clinton passed. GWB passed. The Worm was (wisely) never even asked. No, it won't hurt him not to have gone. The Israelis will still be polite and co-operate within reason. Still, it were better he had.