it is a question of grammar

i suspect the correct way is paramount to the arbitrary way you would like

the Constitution offers certain protections without regard for any prior or future actions on the part of any individuals, therefore, when any person who decides the federal government is not legitimate, it does not make it so, and the Constitution is mandated to protect even these foolish folks

i think what you are suggesting is why would someone who believes the federal government is illegitimate remain in America? but there is an obvious answer .... to remain under the protection of the very thing they abhor
ignorance is the enemy
without equality there is no liberty
Get off the crazy train!!! ... dump Trump