First - these clerics are associated with the Society of Jesus' Thomas Aquinas college in Moscow and the related Ecumenical (Catholic) Moscow Biblical College.
Secondly - they obviously aren't talking about Orthodox theology. The stance of the Church Fathers and the Liturgy is not anti-Semitic but anti-Judaic. Jews are a people, hatred of Jewish people (including Christians of Jewish ancestry) is what anti-Semitism is. Disagreement with Judaic religion and theology, however, is what one finds in the Fathers and Liturgies. Having said that - there *is* anti-Semitism amongst Orthodox people, but one won't find it in the Fathers or Liturgy. I'm of Jewish ancestry, and expected those texts to not be excised when we prayed - that was just affirming the Church as Israel, the Jerusalem of God and not the Babylon of the Pharisees. The anti-Semitism I experienced was in the rumors I was Mossad simply for speaking Hebrew and admitting Jewish descent.
The anti-Semitism is in those who are suspicious of clergy and laity of Jewish ancestry, or not wanting to share in the Church with people of Jewish ancestry. It might help to read http://www.ocf.org/OrthodoxPage/reading/jewish_1.html
by Dr. Gregory Benevitch, of the St. Petersburg School of Religion and Philosophy (translated into English.) Dr. Gregory understands what these anti-Orthodox 'dissidents' don't. That is, the Church is Israel and the disagreement was an internal one centered around the accepting or denying of the Messiah.
Strangely enough, this charge comes out of these Jesuit-associated clergy at the same time others in their association are attacking the possible restoration of the traditional Roman liturgy in the West... that suggests a shared attitude, and a hope to use the publicity to 'kill two birds with one stone' - the liturgies that descend from the Apostles. The attack starts with the Liturgy, the next step is purging the Scriptures (Epistles and Gospels.)
Finally - YOU killed Christ. There are no Gentiles in the Church. When you disavowed your pagan gods, you left Gentilism and entered Israel - you worship the God of Abraham, Isaac and Jacob. When you disavowed the leaven of the Pharisees (their hypocrisy and fence-building), you were restored to the Remnant of Israel - the Church. That's a New Creation, a new nation called by His Name. That being said, as Israel - the words of the liturgy are a call for YOUR repentance (everyone.) As St. Paul said, that if we sin - we crucify Christ anew. So, again, it is not anti-Semitism in the liturgy - but strong medicine, Orthodox theology, and that call for repentance.