Argentines are following the recent development between UK and US. U.S Govt. was not too happy about Abdelbaset Ali Mohmed al-Megrahi release. The release of the torture documents didn't help the relation either.
Diplomatically speaking it was a good time for Argentina to make a move.
This does put us in a little awkward position. Not supporting Argentina allows Chavez to try to drive a wedge between US and OAS. OTOH UK is the key ally.
I do think the issue is still far away from any military confrontation.