It's not a grave, foolish comparison. They have a grave, foolish and disgusting lifestyle. The Bishop is merely telling the truth.
If the press did not support and endorse the perverted point of view, then there would be no 'row'. It is when the 'mainstream press' supports one side of the argument that these issues become so divisive. The Abp should stand by his guns and stay on the issue, just as he has done.
Prayers up for his courage and witness.