FO1 allready puts into question their viability as an organization, they´re presented as imperfect, and their fate could be considered foreshadowed allready then
By FO2 they´re presented as pretty incompetent all in all
FO Tactics shows them as cruel invaders, at least for the first third or half, you pretty much play as a heartless invading force, enslaving, terrorizing civilians etc. This branch or iteration is presented as pretty much indefensible, especially in how civilians will talk to you about it.
FO3 I don´t even know... no, I´ll take them as face value, and at face value, they´re bumbling, incompetent morons
FONV brings back to the BOS of FO1 and FO2, the diminishing, isolated, misguided cult
FO4 seems to want to allude to FOTactics, so much so, they stole the airship idea right from there, also bringing back the militarism, conquering type of M.O.
If we are to continue taking these iterations at face value, we got no choice but to consider them different branches that once originated with a single organiation, but have since become independent of each others. One is a techno-cult in decline, with only a handful of members. Another is an invading militaristic force, presumably with stretches of territory under their control.
The latter *could* be defended, in the sense that they seek to unify and "tame" the land, peace through subjugation and such. Then again, they´re being needlessly bigoted about it, with the whole enclave-esque "only pure humans allowed" vibe
My answer would be "no." I guess
