Regarding no financial support for the Byzantine church

Yes, financial support must be withheld from any priest who adheres to heresy. And all of the Eastern Rite priests who accept Benedict XVI cannot be supported because they are adhering to a heretical position which accepts the Vatican II sect. A Catholic cannot support a heretic or one who endorses or promotes heresy.

Pope Innocent III, Fourth Lateran Council, 1215: "Moreover, we determine to subject to excommunication believers who receive, defend, or support heretics."

One cannot ever compromise the Faith by supporting those who don’t hold it simply because they have a valid Mass. The Divine liturgy of St. John Chrysostom is a valid Mass, but the Eastern “Orthodox” Schismatics have a valid Mass, too. It doesn’t matter if their entire church shuts down, a Catholic cannot support a priest who adheres to heresy because THE FAITH COMES BEFORE THE MASS. If one can support the Eastern Rite priests or the SSPX or the CMRI or another heretical group of priests, then all of these issues are completely meaningless. That is why those who are aware of this information and continue to donate to heretical groups, such as the Byzantine priests or the SSPX or the SSPV or the CMRI, etc. are committing grave sin and putting themselves on the road to damnation. Actions speak louder than words. One can say that he doesn’t agree that Benedict XVI is the Pope, or that he doesn’t accept Vatican II, but when one donates to a priest who holds those position his actions prove that he supports both of those things.

The only reason that a Catholic could attend the Masses of some of the heretical Eastern Rite priests, heretical SSPX priests and heretical CMRI priests, etc. is because there is no other option for most today in a necessity, and, if they are not supporting them as they shouldn’t be, they are not supporting their heretical beliefs in any way. But if the priest becomes notorious or imposing about his heresy (such as the SSPV has and certain SSPX and Eastern Rite priests have), then not only can one not support him, but one must not attend his Mass even to receive the sacraments from him. There is also no obligation to attend any church where the priest holds to heresy, so that if one doesn’t want to go just to receive the sacraments he doesn’t have to.

Please See This File for the updated Guidelines and Principles on this issue