There is an article based on sound principles in the July to September 2014 Edition (refer to pp. 39 to 42) of the Saint John’s Bulletin published by the The Society of St. Pius X in Ireland on why we ought not to assist at Traditional Masses offered by the priests of the Ecclesia Dei communities or by Diocesan priests. It concerns “communicatio in sacris” (worship in common). Whereas I essentially agree with the principles stated therein, the author should realize that the same principles can now be applied to Masses offered by the neo-SSPX. Why? Because the neo-SSPX leadership has officially accepted a condition (First Condition of the 2012 General Chapter) that is not Catholic. Furthermore (but intimately related) is the fact that the neo-SSPX wants a canonical regularization prior to the resolution of the doctrinal differences. I have explained here and here that this position is an offence against the Catholic Faith and hence one who assists at neo-SSPX Masses shows, objectively speaking, a unity with this position.
We at the Our Lady of Good Success Mission again call upon all the faithful who want to remain true to Our Lord and the position of Archbishop Marcel Lefebvre to seriously re-consider assisting at neo-SSPX Masses.