Seems like an obviously good idea to me, though no doubt he'll cop a load of flak for it.
I mention marching songs and you essentially tell me I'm wrong by saying they're a German thing. So it's OK for you to contradict me but when I do the same in response...
My apology was sincere. I got it arse about face, was rude to you, and for that I apologise, for the third time. But it is hardly the biggest deal, I didn't do something awful that requires serious grovelling, I think the level of apology you have received far outweighs what you'd usually expect when someone has been an arse to you on the internet.
No skin off my nose of you don't accept it.