FACT OR FICTION???

I AM WATCHING A VIDEO https://www.youtube.com/watch?v=fESkD0sIyXo AND THE PERSON BEING INTERVIEWED SHARES THAT HE IS A MILITARY MAN AND THAT HE TOOK AN OATH TO PROTECT AMERICAN LIFE AND PROPERTY I THOUGHT THE OATH WAS TO PROTECT THE CONSTITUTON AND THE PEOPLE OF AMERICA. HAVE THEY TAKEN THE CONSTITUTION OUT OF AMERICA IF SI WE ARE NO LONGER AMERICA???