Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances.
Petitioning to leave the country is not the same as petitioning for a redress of grievances.
If a liberal was looking to revoke their own citizenship, there wouldn’t be a single person here at FR who would argue that this would show allegiance to the country.