They are supporting the Lebanese Army to shoot at other Lebanese (and Palestinians) but not at Israeli invaders

"Some members of Congress are threatening to reassess US aid to the Lebanese military following its border clash with Israel on Tuesday. “To start shooting as they did – one person killed, one seriously injured – is a very serious move by the Lebanese army,” said Florida Rep. Ron Klein, who sits on the House Foreign Affairs Committee, in response to a question from The Jerusalem Post."