I don't think anyone has a problem with people having a differing view, or at least they shouldn't do. Forums are all about opinions, and it'd be a dull place if we all agreed all of the time. I just think it's some of the ridiculous hyperbole that grates with some, and causes arguments.
If someone said they were concerned that the De Bruyne transfer is taking so long and are worried the deal won't get done, then I don't think anyone would have an issue with it. If, however, someone says "FFS! This transfer window has been an absolute joke! We should fuck Begiristain off", then people are going to accuse them off flapping unnecessarily.
People just need to be reasoned with their debate, and not be deliberately over the top in order to provoke a reaction.