ditto. No way a SAM or scud could have hit this target. Sounds like it was tile damage causing a furher peel on re-entry. Remember in the early shuttle days they had problems with tiles falling off during re-entry. With the damage on lift off, I would guess that more tiles fell off when atmoshpere was encountered, snowballing until breakup occurred. I just hope it was fast and painless for the poor souls inside.
Indeed, there are no anti-aircraft missiles that can reach 200,000 feet, and making one would be virtually impossible, even if al-Qaeda had a massive project backed by Iraq and Mexico. (It would be a big missile, hard to hide without backing from Mexican or Texan authorities.)
But at least some Islamists will claim "credit," either for themselves or on behalf of Allah himself. They could not help themselves, given the Israeli angle and the Palestine Texas angle.
On that note, I just heard that the Israel Air Force Colonel on board was one of the pilots who bombed the Osirak reactor in Iraq 20 years ago.