Does the gospel require us to teach one another not to bully LGBT students, or to love and welcome them into our communities? In the first instance, we agree not to harm others; in the second, we agree to accept and welcome. I don't think people of faith can argue that the former is what is required by the gospel.
I think the gospel mandate is to welcome one another in love and share in Word and Sacrament, trusting the Lord to bring about the conversion of minds and hearts required of believers. The more we isolate and alienate one another, the less opportunity exists for our conversion through the power of the gospel. Bishops who look forward to the "conversion of sinners" should understand that such "conversion" won't take place unless we bring the gospel to others, or allow them to come to us.