I don't see what Argentina has to gain from drumming up anti-British sentiment, except another embarassing loss in a second Falklands war.
Look a little harder, perhaps. It's not going to come to war because Argentina isn't run by a collapsing military dictatorship.
It most likely won't, but it seems silly that there's been a recent effort to criticize Britain on the issue. CFK is popular, and the economy is stable. There isn't a need for a nationalist Malvinas movement to be gaining traction and yet it is.