Here you go, for the 540,205,101st time on this topic:
No person except a natural born Citizen, or a Citizen of the United States, at the time of the Adoption of this Constitution, shall be eligible to the Office of President; neither shall any Person be eligible to that Office who shall not have attained to the Age of thirty-five Years, and been fourteen Years a Resident within the United States.
They excepted Citizens of the United States at the time of adoption of the Constitution because otherwise there would have been no one to be president.
We had just finished winning our independence from a country called England—The War for Independence/The Damned Rebellion—and many of the new Americans were either former British subjects or born in England.
For example, Alexander Hamilton was born in Barbados. It is unclear where Obama was born, or what his real name is, and his likely father was a British citizen.
In 1860 we fought another war—the Civil War/War of Northern Aggression—and it was fought blah blah blah.
Why do we have to keep re-teaching American history and Con law? Try to keep up!
You have posted what you want the Constitution to mean.
You have not, in any way, posted what it does mean.