I think Rosell said those words not meant to disrespect your club but explained the situation as he asked about it. Well, I know that not every place have the same way to judge something is rude or not (like in my country if you kiss someone in the street you will be crucify as pervert while on another country it's just normal), so maybe that Rosell's words sounds rude for the French people but not for some people outside French.
It concerns only the french football fans and medias because of history. Let me explain it a bit.
Let's talk about history like it was related by
Fred Hermel, French Consultant from the french RMC's radio covering the Liga.
- Each times Madrid or Barcelone wanted a player or manager, they used said players/managers to force clubs to start to negociate when they didn't want to sell them or sometimes even before contacting the clubs. How to convince them to go for the clash? Money, prestige, presenting their clubs as historic and dream teams, spinning their heads etc.
- The most recent case is Ancelotti. Madrid asked ancelotti and his agent to do all the job. To clash with psg after 6 months of lobbying on ancelotti and his agent.
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As you can see it, I hope you'll understand why french hate what rosell did. Because for once what rosell tried didn't work, so instead of staying in the shadow, he even tried to make moves publicaly. Which irritated people here even more.
French clubs are so used to be manipulated by rich spanish clubs that when Rosell made his comments, of course it was seen as a declaration of war around here.