The Constitution was created to protect us from those who believe we do not need a Constitution. This includes any who would warp the Constitution for their own agendas.
The Constitution, the Declaration of Independence, and the Federalist Papers are not loose notions based on "outdated" ideals. They were crafted by people who had lived through too much, seen families and countries destroyed, and meticulously formulated documents to create a country unlike any the world had ever seen.
If you don't believe in the right to bear arms, then you have never feared for your life. If you do not believe in free speech, then you have never been censored or silenced. If you do not believe in freedom of religion, then you have never been persecuted.
It is not your interpretation. It is not my interpretation. It is not a question of political party, religion, race, sex, or age. When you are sworn into public office, you raise your right hand and swear to uphold these documents.
Anything less from a legislative representative is unacceptable and is treason.