I’m not sure what you’re intending to ask with this question.
Is it theoretically possible for an American citizen to take on a role that would characterize them as a legally defined enemy of the US?
Yes.
Has it happened that American citizens took on roles that made them enemies of the United States?
Yes.
Are all American citizens enemies of the United States by grace of being American citizens?
No.
Does a citizen making a violent attack against the United States with a terroristic intent or with the intent of overthrowing the democratically elected government mean that the citizen violated 14.3?
No.
Is a person who has taken an oath to uphold and defend the Constitution of the United States, and having engaged in an attempt to overthrow the government by means of force, or who has aided enemies of the United States including those engaging in such acts or attempts, fall under Section 3 and is thus barred from holding public office without a Congressional removal?
Yes.
That is not what makes their actions the actions of an enemy. They’re enemies whether or not they’re also oath-breakers. They will have to face the consequences of their actions as combatants, terrorists, or however their actions are classified. s3 is an additional bar from them again holding office, since they’ve already demonstrated their propensity to destroy that which is entrusted to them.
I’m not sure what you’re intending to ask with this question.
Is it theoretically possible for an American citizen to take on a role that would characterize them as a legally defined enemy of the US?
Yes.
Has it happened that American citizens took on roles that made them enemies of the United States?
Yes.
Are all American citizens enemies of the United States by grace of being American citizens?
No.
Does a citizen making a violent attack against the United States with a terroristic intent or with the intent of overthrowing the democratically elected government mean that the citizen violated 14.3?
No.
Is a person who has taken an oath to uphold and defend the Constitution of the United States, and having engaged in an attempt to overthrow the government by means of force, or who has aided enemies of the United States including those engaging in such acts or attempts, fall under Section 3 and is thus barred from holding public office without a Congressional removal?
Yes.
That is not what makes their actions the actions of an enemy. They’re enemies whether or not they’re also oath-breakers. They will have to face the consequences of their actions as combatants, terrorists, or however their actions are classified. s3 is an additional bar from them again holding office, since they’ve already demonstrated their propensity to destroy that which is entrusted to them.