Rest assured that if this thread had been about the wish for an autograph of a Russian, Yugoslavian, Polish, Czech or whatever war criminal, I would have found it every bit as offensive. Yes, indeed, an NKVD-, Ustasha-, Khmer Rouge-, Taliban- (etc. etc.) murderer is obviously no better than an SS one.
Fact is that this thread is not about one of those, but about Priebke specifically, and there simply is no point at all in bringing them into play.
It is also a fact that Priebke was actively involved and in - and partially responsible for - an act of mass murder - not even an excess of violence committed in the heat and confusion of a battle, mind you, but a cold-hearted mass execution of helpless civilians - and that he was unrepentant and unapologetic to the last.
That he was a "Nazi" is actually of very little interest to me in this context.
What uniform a man wears or under which label he goes is not important to me. It's what he does that matters.