The Church has some pretty specific, well-known, and immutable teaching on whether homosexual behavior is sinful. (It is.)
Some people disagree with this teaching, including an outspoken Methodist clergyman. Some of those who disagree recently attempted to receive the Sacrament of the Eucharist during a college campus mass being celebrated by the Archbishop of the Twin Cities (Minnesota). They were wearing rainbow sashes and protest buttons.
Fortunately, the good archbishop was not willing to allow others to play games with the body of our Lord.