We are called to bless even our enemies. How much more should we pray a blessing on others in the Body of Christ! Especially those we disagree with, or who hold a different view from our own.
If we ask a blessing on them, it is up to God to decide what He can and cannot bless in what they are and what they are doing.
We are not asked to understand each other first. If there are some elements in the church who really aggravate us it may be more useful to pray a blessing on them than to interact in a critical spirit. As we pray we begin to realize just how much God cares about them.
Celtic Prayer Book of Northumbria