They shoot their own hostages in what seems like remenants or revival of the hanibal directive. It'd be foolish to assume they wont bite the hand that feeds, especially when they get away with everything they do. Why would Israel expect consequences?
But having the US navy run it might. Essentially, it becomes a question of who blinks first. Humanitarian organizations run away scared when the regional power starts dropping bombs and shhoting at them; and Israel knows it.
Picking a fight wirh the US military is a much bigger deal. This is why the US response to conflicts is often just "send in an aircraft carrier to float around near the issue"