It isn’t inevitable, but based on current trends, it is more likely than not: the GOP is going to tighten its ties with right-wing militias. There are two ways this could happen. The first possibility is that some as yet unknown charismatic figure could succeed in expanding and merging the current ragtag groups and then become a prominent figure in the GOP. The second is that the existing GOP leadership could become more closely affiliated with the militias, and learn to call on them for action every time just owning the libs on Fox isn’t good enough.
As of today, the second option is more likely. The militias would become a universally recognized, but lightly denied, military wing of the GOP. The IRA to the GOP’s Sinn Fein, as it were.