No negative feelings for Madrid? Every Barca fan should have negative feelings for Madrid and visa versa, it's part of a healthy rivalry. Pretty weird thing to say, Barca fans are brought up disliking Madrid especially Catalan like myself.
No, i absolutely despise the unnecessary "you must hate" bs for foreign fans. I have absolutely no connection to Catalans, i just happen to like a club in the region, have for a long time and thats it.
Just because i like 1 club does not make me "unlike" another club. I of course do not want them to succeed at times, as in most of cases it would mean Barca not succeeding, but in European competitions for example vs English clubs i almost always support any other Spanish clubs, because i just like the way football is played in La Liga alot more than in Premier league. And if Barcelona does not win a competition, i dont care if Real wins it, Atletico, Sevilla or any other club, it has no meaning to me.