I don't think that the MOAB killed anyone.

[Thumpalumpacus]

Why would we?

For starters, the Syrian base was partly operational within a few hours after the 59 Tomahawk missiles (nearly 3 times the blast of one MOAB) hit it (assuming that they all made it; at least one did not) and was fully operational within a day later.

Attacking an air base (which is likely ringed with SAM and triple-A defenses) with a turboprop that can't quite pull 400kts IAS empty, much less lugging 11 tons, is probably not a successful mission profile. You have to use the right weapon for the job.