I don't see this as off topic.

Guy asks if he should join Oath Keepers
I submit evidence that they are insurrectionists inciting armed rebellion
Another guy says that the time for armed rebellion is upon us
I tell him to put up or shut up.

If you want to join Oath Keepers, be aware that they are no longer a public safety education group, but instead insurrectionists inciting armed rebellion. If you think that's appropriate, then go get to it. If not, then don't join. Like another poster said, why would you want to join an organization of people who fantasize about murdering you and your coworkers?

Done