Airlift Group used the IATA regulations (probably still do) for everyday operations. The Military DEOCL was used for military specific type cargo and weapons, pretty sure butane gas cylinders for camp stoves didn't come under the DEOCL.
Army deployments/re-deployments always came under close scutiny as the bags typically turned up hexamine tablets and these type of butane cylinders. Used to be a requirement to check 10% of the bags initially. If anything was found a 100% check was then required.
Yes military aircraft carry things that go bang. But they are a part of the operational requirement for that aircraft and the risk is assessed when the fitment is carrried out. Random people boarding aircraft with unknown DG places uncertainty on the aircraft just as it does on civilian aircraft, that's why we have the IATA and the regulations, DG in excepted quantities etc etc.
Bottom line. You couldn't just throw dangerous stuff on a military aircraft without permission, there were still regulations pertaining to DG. You break them you get charged. Simple. It might not have been the primary cause of the accident but if it was an intentional breach of the rules it has to be prosecuted.