Is it just me, or does it seem like this thing is just a big sitting duck? Except the duck is floating slowly, not sitting. Has to be a lot easier to take out than a maneuvering jet aircraft with countermeasures. Probably some Greenie thought it was a great idea.
I'm not sure that zeppelins are as easy to destroy on purpose as one might think. Because the gas is close to ambient pressure it doesn't just rush out when there is a hole. And normally it would be kept in multiple cells. Of course the engines and control compartments could be attacked, but maybe that wouldn't crash it either (unlike a plane). And of course it would probably be escorted.
As I recall a lot of the famous zeppelin crashes were due to the weather. So that is a major liability, as is the fact that the lifting capacity diminishes with altitude.