In the effort of being fair to the priest, whose words have not actually reproduced here, what did he actually say? It is true that one must reject certain doctrinal positions when entering Orthodoxy (such as the Filioque), but this is hardly anti-Catholic, just as rejecting Sola Scriptura or TULIP is not anti-Lutheran or anti-Calvinist in the normal sense of these words, which connote a type of irrational bigotry against the group in question. If he suggested merely that you would have to condemn certain doctrinal propositions, then it is completely true that one must do this (by the general pattern for accepting converts from heterodoxy, established by canon 95 of Trullo). If he suggested though that one must have an irrational hatred of the Latin church, the people in it, or of all her customs, then that is clearly false, because our canons and ecclesiastical decrees concern only specific points of doctrine or discipline and nowhere command that one should display an irrational hatred of the heterodox.