The Episcopal Church has made a devastating decision to sanction homosexual "marriages" within its church. This move is in absolute contradiction with biblical teachings and law. Verses such as 1 Corinthians 6:9-11 and Leviticus 20:13 clearly condemn homosexual conduct. In addition to this, Jesus defines marriage as to be between a man and a woman (Matt. 19:4-6).
It definitely won't make them more popular, but I feel that in doing this the Anglican Communion has stood up for the truth and for God's word. The Episcopal Church's view of marriage is at odds with the Bible and as such they should not be a part of the larger fellowship of believers.
The Anglican Communion has forbidden the Episcopal Church from participating in the communion's internal decisions or representing Anglicans in meeting with other Christians because the Episcopal Church's support of same-sex marriage is at odds with Anglican doctrine. The Episcopalian Church is in the United States, where gay marriage is now legal. If the Episcopal Church decides they will accept same-sex marriage and are comfortable with marrying gay couples, why can't the Anglican Church let it go at that?