As part of its ecumenical efforts, the conciliar church calls non-Catholics by the name “Christian”. For example:
But even in spite of [obstacles to unity] it remains true that all who have been justified by faith in baptism are incorporated into Christ; they therefore have a right to be called Christians, and with good reason are accepted as brothers by the children of the Catholic Church . . . .
Vatican II document, Unitatis Redintegratio, §3 (emphasis added).
The new SSPX as adopted this conciliar practice. For example, in DICI’s recent article about Sri Lanka, the SSPX said that the island was “7% Christian (6% Catholic and 1% other denominations)”. January 30, 2015 DICI #309, p.5.
The new SSPX’s conciliar practice is contrary to the Catholic truth. As shown elsewhere on this site, Catholics should never call heretics and schismatics by the name “Christian”.