Given it's not even in reference to terrorist attacks, I don't find it in any way offensive personally. And I was pretty shaken up by how close to me the Paris attacks were.
Well, quite. Obviously there's absolutely no difference between a comment about a pacemaker exploding during the cremation process used to comic effect in a work of fiction and a real suicide bomber.
I'd suggest not using the arj utility to 'explode' any old archives during this difficult period until such time as you feel more able to cope. If you absolutely must, then I'm sure PTSD counseling is available.