So low-strata fascists are typically like low strata cultists^†^ in that they're typically drawn in by neo-nazis (or whoever) giving an ounce of regard to them when they're alone and socially isolated. The indoctrination and costly identity markers follow.

At least this is my take based on stories I've heard from those who have escaped hate groups, militant groups and dangerous NRMs. Transition from membership to outsider (optimally involved in more benign social groups) is difficult and takes a while.

That said, fascists are dangerous both by being politically active (in the US, politically active in a system where safety checks have been stripped away or subverted) and by being violent or engaging in direct action. And in these cases, doing what is necessary to stop them can qualify as self-defense.

† As a cult researcher, I feel the need to define this, since cult is a loaded word. By low-strata cultist I mean a low-rung member of a dangerous NRM or seller from an MLM.