Eh, no, I do suspect something like 60% chance of terrorism, to snatch a pretty random number out of thin air.
If in fact the aircraft did achieve and hold an altitude of 33,000 feet then I am strongly dubious that the cause of the crash could have been a small MAN PORTABLE missile, like the SA-7 Grail, which is incredibly prolific.
Larger missile? Yes.
A hostile aircraft? Yes.
A bomb? Yes.
An on-board fight instigated by suicidal fundamentalists? Yes.
But the chances that an SA-7 (small, man portable) missile could have downed that aircraft at an altitude of 33,000 feet is less than 0.1%, since it has a service ceiling of 4.5 km.
The one and ONLY thing I'm saying is that there is no way with this baby.