8. It seems Washington and London were unhappy with Algeria's ham-fisted and unilateral violent action.
They were likely hoping the hostage situation would be resolved without the scenario of Algerian Army and Air Force units bombing the location where the hostages were and then sending troops to overrun the location guns blazing.
On the other hand, if Algeria's military forces can reach into Mali like that and do damage to these religious fundamentalists and Tuareg nationalists, the other question on Washington's mind is what happens to all the gold and uranium resources that Mali has that Algeria could incidentally be in a position to capture. If Algeria decided to go it alone and occupy northern Mali to destroy the hideouts, they would become de facto controllers of these rich mineral resources whether Washington wants it or not.