Outrage generally isn't triggered by breaking laws; rather, "moral rules" and "disrespect".
A certain strand in the US considers the constitution an almost sacred document. Their outrage is less about laws being broken, and more about a perceived violation of sanctity. I'm fairly confident they don't feel the same way about e.g. driving 5mph over the limit.
Constitution is the highest form of law. IANAL but from what I understand all laws are made in such way that they shouldn't contradict constitution. If laws openly go against the constitution it weakness its position as the supreme law of a state/nation (for better or for worse).
A certain strand in the US considers the constitution an almost sacred document. Their outrage is less about laws being broken, and more about a perceived violation of sanctity. I'm fairly confident they don't feel the same way about e.g. driving 5mph over the limit.