I wouldn't question that there are fans in South America who can create an atmosphere and some of them can be quite fierce when defending their clubs and their manors. Brazilians and Argentinians are probably stronger than Italian ultras in general.
However I think that the English style of chants tend to be more fitting in the moments in which they are sung. It's more of a natural part of the roaring crowds than a choreo with accessories such as drums, megaphones or even mics and speakers. I don't think a proper football crowd should require group organisation with apointed leaders. Fanaticism should be as spontane as possible and come from each individual supporter independantly of what a "capo" says or does.
I noticed that Celtic were included and they are famous for their support but it should be said that Green Brigade have a very small part of that. I've been to Celtic Park myself as an away supporter and it really doesn't take much to make yourself heard during the periods when only their ultras are active. It's a completely different story once the singing spreads to the rest of the stadium and the times when that happens it tends to be more related to moments in the actual football game.
However, I'm not protesting against any "sectarianism" or violence which might be more likely to occur with Green Brigade involved than how likely it is to happen with your average Celtic fan. Styles of support shouldn't be mixed up with the level of commitment and I want that level to be very high.
