Goes to show though that my post that included a little whimper that I did not intend to 'start a political discussion' was a bit hopeful!
I think we need to emphasise context - not the Nazi context but our own. Years ago when at school the authorities were concerned about our obssession with rude jokes - glad we all got over that! - and one of our more sympathetic teachers said that if we laugh at the smutiness that is bad, but if we laugh because it is clever, that was different.
So - if you collect toy soldiers depicting the Nazis - and you do so as a history buff or as a toy soldier collector, that, in my opinion, is fine. If you drag your jackboots out of the closet in April at your annual Hitler's birthday party gathering and show off your soldiers, that would be bad!