1. He did not have an alarm system-Nowhere did it say he did or did not
2. IF he had an alarm system it was not turned on-Could it hav been a power failure, wires cut, etc.??
3. He did not even have a deadbolt-Never stated in the thread
4. IF he did it was not locked-You question your own assumptions with more assumptions
5. You assume he told people about his collection-Never stated in the thread
6. Indicate it was the neighbor's kids who broke in-You are the only one who knows this without proof

You state It's just dumb. Leaving a collection, unattended. Do you always keep your collection with you, just never leave home or are you just dumb.

You should go around the country solving crimes! You must have ESP or something!! LOL Well, that is IF any of your assumptions are correct..... Shall we 'Assume' otherwise?? hahaha