Some folks might find it disrespectfull. I believe that it's a good way to HONOR the actions of men who REALLY FOUGHT and REALLY DIED in those units. However the behavior of SOME of the AH pilots flying under those bloody flags is anything but honorable ... and could EASILY be construed as objectionable.
You asked ...

I very rarely see one flying under a historical squadname being dishonorable. Let it be an english, american or german historical name. I know 1-2 exceptions but thats very rare.
JG11, KN, 71st, 80th, Duxies, VF-17 i think, 39th Cobras, mostly good men who fly for the fight.