In defence of the mods, there has been so much trouble here over the last few years, that admin cant be expected to give rhyme and reason for EVERY deletion, some are self explanatory.
Regarding Bonzo's thread, probably the mod who deleted it thought that it was a "trolling" thread and decided to remove it before it became nasty.

Alternatively it is possible that the sentiments expressed angered the mod and they used their "veto"........we all make mistakes move on.