Msgr. Pearle of the Ecclesia Dei Commission said it was OK to attend an SSPX Mass and to even give them money. Who are you to contradict Rome?
Attending humbly for reasons of conscience is one thing. To publicly proslytize and build up schismatic parallel structures that continually question the authentic magisterium of the Catholic Church and thumb their noses at the legitimate authority within the Church is something else altogether. That has never been permitted.
Unfortunately, as you will understand, we have no way of controlling what is done with our letters by their recipients. Our letter of 27 September 2002, which was evidently cited in The Remnant and on various websites, was intended as a private communication dealing with the specific circumstances of the person who wrote to us.
Strange how this proviso always gets left out, isn't it. More generally, Msgr. Perl writes, on April 15, 2002,
Q. If for a serious reason one has to assist at a Mass of the Fraternite Saint-Pie X (marriage, funeral, school feast...) should one abstain from Communion?A. Yes. For eucharistic Communion is also a communion with the Catholic Church (“The Church makes the Eucharist and the Eucharist makes the Church”) from which these priests have separated themselves.