[ThomasThomas]

Quakers do not take oaths, citing James 5:12 “. . . do not swear—not by heaven or by earth or by anything else. Let your ‘yes’ be yes, and your ‘no,’ no, or you will be condemned.”

[American Constitutionalist]

That bible verse means those who would swear on their father's or mother's grave in a test of their honesty.

What James is talking about is being honest as like the old saying goes ( not true today anymore ) a man's word is as good as Gold.
This bible verse is not talking about swearing allegiance to some country or group.