Could it be Obama's not addressing the Knesset, not because he chose not to, but because he wasn't invited to?
Probably. Parliamentary systems are noted for raucous legislatures, and Israel has its share of dissenters from the establishment. It might be a PR decision to save O embarrassment.
Net appears to be going overboard for Obama...That's always a nice touch...aka...keep your enemies closer.
Obama will relish it because the light from his mirror blinds him.