It's funny. What many conservatives see as negativity, I see as putting thing in a proper context.
A conservative would see something like the
School of Americas as an attempt to bring higher education and develop strong ties with America's southern neighbours, I would see it as an attempt to subvert existing governments through external influence, ultimately supporting military dictatorships.
It's something of the past. It was, in my opinion a horrible thing for the US to have done. From the conservative world view, we should not talk about these sorts of things. They are too negative. I think we should talk about them so we don't do them again... or can at least recognize them when they reoccur, for what they are.
It isn't about America bashing per se. I simply feel you need the whole, accurate picture in order to move forward and build a better way.