There should be a thread for Barcelona hate, as there are too many sympathizers and haters here, it's fun, I don't think any serious conflict will come out of that.
I don't think there should be any IMO.
If we allow Barcelona thread then you can expect many other threads, Man Utd, Real Madrid etc... and in each one of them we will see the same things we're reading in the La Liga and CL thread. Aaron, Burke and many others support different teams than ours but I don't see them opening a new thread for their favorite team nor players.
At the end of the day lets not also forget this is a Juventus forum, if there's anything to discuss about certain teams we can do it in one thread and not multiple ones.
Not to mention that it's really such a headache for Moderators and members to have to go through repetitive heated discussions over here. Almost weekly.