You are spot on! One of the terrible possibilities with the democrat approach to appease and talk to terrorists is the very real possibility of them detonating a series of two or three nuclear weapons in the Gulf. The tsunami waves would render the Gulf Coast unihabitable for quite some time and the GUlf gas and oil platforms would be utterly useless, not to mention the escaping gas and oil rendering the Gulf a dead zone. The American voters are dumbed down purposely and there are factions within the government (read democrats, purely and simplely adversaries to US dominance, democraps) so determined to render US a non-super power that it is perhaps too late for literally millions who will be sacrificed in the democrat empowerment scheme. If folks think Katrina did some damage, wait to see what al qaeda can do to the entire Gulf coast with two or three nukes detonated below surface in the Gulf. Or off the coast of New York, Baltimore, Boston, if you like.
Not to compound the threat, but letting a country like mad mullah Iran achieve nuclear weapon status is a sure way to get nukes into the ships owned by al qaeda or operatives cooperating with al qaeda (Dubai Ports World anyone?). Such nukes could easily be packaged for dropping into the Gulf and sunk to a particular optimal depth before detonation. N. Korea and Iran with nukes is a sure way to bring about massive death and mayhem ... but then, that's precisely what the Rockefellers and democrats in general want so they can occupy the vacuum. Enjoy the democrat return to power over you, America. The happy days will be short lived and the death and destruction will surely follow. We know this as surely as day follows night because the democrats are showing their treachery and have learned to sacrifice millions in their empowerment schemes (read abortion on demand, if you doubt their gleeful deal with the devil).
It would take quite a bit more than two or three 10 kt devices to do that. Water is extremely heavy, and a lot of the water around a nuclear burst is just vaporized, not lifted and dropped.
For reference, the Crossroads Baker shot in 1946 involved a 20kt device (identical to Trinity and Nagasaki) exploded 80 ft deep in Bikini lagoon. The resulting wave swamped some of the target ships in the lagoon, and the reflected concussion blew the bottom out of a (target) aircraft carrier. However, the surrounding atoll was not at all wiped out by the tsunami. (AFAIK, it didn't do any appreciable damage on land.)