life is full of jerkoffs, sadly. juan was very nice and chill the times i hung out with him (we had a couple mutual friends), and i'm sure in another context, he would have been friendly to you too. but he wasn't. so that's life, and you can at least go away from this knowing that in this context you were the better man.
i can't say i'm a big fan of posting this kind of stuff on the internet though.
as for detroit, well, it's slowed down a lot. safe to say it's not what it once was. but all great things come to pass, and at least there are some good records still coming from there (the los hermanos album was, IMO, awesome)...and those old classics are still, well, classic.