I was in the fourth tier in Madrid and I did not hear any specific references to "Munich" other than the obvious ending to the "Hate Man United" song, which a few people like to chant.
The number of "Munich" chants has certainly seemed to be reducing in my opinion but before any United fans start slagging off City lets just think back to how respectful City fans were at Old Trafford a few years ago on the 50th anniversary of the Munich disaster! Everyone believed that City fans would be disrespectful on that day, we were exactly the opposite and were rewarded with a quality performance and a win!
If they do the same against Liverpool then fair play to them but I think the word hypocrits springs to mind!
In my opinion as much as I personally detest a number of other clubs and fans, the one thing that has to stand aside from the hatred is when individuals lose their lives.