To begin with, Archbishop Vigneron's statement quite obviously includes, by an easy logical extension, Catholics of any stripe who have been sexually abusive. It reads: “If a Catholic publicly opposes the Church on a serious matter of the Church’s teaching, any serious matter -- for example, whether it be a rejection of the divinity of Christ, racist beliefs, support for abortion, or support for redefining marriage -- that would contradict the public affirmation they would make of the Church's beliefs by receiving Communion.” Vigneron was merely giving examples of the types of behavior which should preclude a Catholic from receiving communion; it was certainly not intended be an exhaustive list but rather a representative example of such behaviors. The implication is that any serious breach of Catholic doctrine, any serious sin, ought to inform a Catholic, any Catholic, that it would not be proper to receive the Body and Blood of Christ. Besides all that, there are no examples of a serious Catholic publicly supporting pedophilia or sexual abuses anyway; Bishop Robinson is mixing things up for the sake of muddying the waters, of causing confusion on a very important matter.
Why would he do that? Likely as not because his own biases are at work. It is not surprising that an openly gay man would support gay rights. But as he claims to be Christian, it becomes fair to ask whether he has taken a key point of Christianity to heart. Has he questioned his motives; has he seriously considered that, perhaps, he is wrong? If Christianity does nothing else, it certainly calls on believers to examine their consciences and reform their lives.
It is all to easy to feel one way and justify that feeling into doctrine. We are after all dealing with a prelate who belongs to a church founded merely so that a king could get a divorce. If there is a secular church in the world, it may well be the Church of England. We ought not be surprised when its leaders, even retired ones, feel that secular wants should triumph over Divine. They began the whole process of watering down Christianity way back in the 1500s.
If what you want are secular values to rule a secular world, so be it. But be honest about it, and kindly do not disparage a Catholic leader supporting a Divine rule. All that does is make all of Christendom less Christian.