Definitely historical/aesthetic!
Always interesting to discuss this,
the genesis of it was likely his dad's influence, who wanted him to go into the military and all, then his dad died, during his formative years and all, but I guess he couldn't altogether shake that influence, maybe ended up taking it to warped extremes...!
But no I really can't believe it's anything sinister, more just quirky and all, he was always the 'weird guy' as he himself has testified, and stuff like that about the SS general does appear disconcerting, but generally speaking he does indeed come across as a 'jolly nice chap', easily one of THE nicest in the whole music biz, and also with this sense of humility (which is amazing given his talent)
I think he is just interested in military history... and continues to be so, he's always remarking on it...
I would be VERY surprised if he actually did ever subscribe to any sort of unsavoury ideology or political views!
on the contrary I always get a real sense of individualism from him, he just does what he does, he just has his own interests..things as diverse as Nazi uniforms and sitar music...
One thing I would really be interested to know, tho - when he wore that gear on stage, how far he did so in a conscious attempt to get some sort of reaction? WAS there ever much reaction?