Sweeping generalisation but in a previous job used to meet people for appointments in the office. Of the ones from Merseyside, generally those who were blues were older, much more mature could have a good conversation about City. They'd say City fans deserved any potential success after all the shit we'd put up with, particularly in the 90s.
The red scousers alas were younger, cocky and to a man utter bellends. I pretty soon learnt not to 'talk footie' with these prats.
Surprisingly the stretford fans were mostly good natured. City fans recognised a fellow sufferer and we had a good laugh dreaming about winning the odd cup of we were lucky!
I've generally found scousers to be alright, maybe talk football with caution! Wouldn't trust 'em with me hubcaps, mind ;-)