It's hard to say at this point whether it was deliberate or not. Those in the "they're trying to depopulate the planet and take over as New World Order" camp would tend to speculate that yes, it was. Or they're trying to keep us afraid and demoralized, so that they can take over, etc. Not sure whether that's Youtube hype or not.
The money trail (documented elsewhere in this forum) would certainly point in the direction of the whole thing being planned; there are lots of indicators that it was known in advance that the disaster would happen.
And I agree that whether it was deliberately planned or not, what happened afterwards was deliberate and we have to face the fact that "they" (privileged few) don't care whether they kill / make us ordinary folk sick etc., as long as they can keep living in the lap of luxury.