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The monastery of Fr Jahir was aligned with the SSPX in pre-Resistance times. I don't know the story of Fr Jahir's ordination.
But of course, Archbishop Lefebvre considered the new rite of priestly ordination valid in itself.
Doubts as to validity arose because of vernacular translations, adaptations, revolutionising the theology of the priesthood etc, such that it became increasingly difficult over time to remove that doubt. Hence, a readiness on the part of the old SSPX to conditionally ordain. One can see clearly from ABL's 'letter to Mr Wilson' what his position was.
The problem with the SSPX now is that it seems to be increasingly favouring validity, even presuming validity. I have encountered this attitude myself with SSPX priests on more than one occasion. A simple blanket statement 'they're valid priests'. Period!
I don't think there is inconsistency in the Resistance, but rather a real quasi-official change of attitude/position in the SSPX.

Dom Tomas de Aquino basically said the same thing about Fr. Jahir's ordination - it is valid. Period! There is the objective position of the SSPX and the Archbishop that presumes validity unless there is anything showing otherwise. And then there are the subjective opinions of laity that does not feel comfortable with such priests hence we hear some are conditionally ordained to assuage such fears and some are not.

What needs to be addressed is that there is a strong Opus Dei influence in the Arlington Diocese.  It's usually the conservative, cassock wearing priests who know how to offer the TLM who are members.  

It has come to my attention that two diocesan priests who fit that description recently visited the seminary in Dillwyn. One of whom I know is strongly anti-sspx. I'm sure the seminary warmly welcomed them but it begs the question of what is really going on with these relations when the bishop here is so against the Society and has even labeled them schismatic. 

The sspx priests down at the seminary are not from this area, and probably have no idea of the OD influence in this diocese.  Perhaps they have been duped by the conservative appearance and apparent orthodoxy of these priests.  But they need to understand that they will never leave the conciliar church and the novus ordo because of their false sense of obedience to the conciliar hierarchy, especially if they are members of OD.