Even if they did do it on purpose (which I don't think they did), the response they received was way out of proportion.
We have immigrants come here and burn poppy reefs on armistice day, the normal people are outraged and complain but they don't start riots, that's left to the likes of the EDL and BNP lot that will riot and end up being violent. That's exactly the people we saw in this special being violent, the nationalists and right wingers of Argentina being incredibly violent.
Quite damning for Argentina rather than Top Gear.
Also if it really were intentional there would be footage of clarkson makes jokes about it prior to the events. They couldn't even keep him singing eenie meenie minie mo under wraps, no way they would be able to conceal that footage.