Actually, this church is protesting against the denomination’s stand on same-sex marriage.
Only that particular local Methodist Church. The Methodist church follows their book of discipline and bans gay marriage.
The Book of Discipline of The United Methodist Church
http://www.nyac.com/pages/detail/1755
Part IV
SOCIAL PRINCIPLES
http://www.nyac.com/console/files/oFiles_Library_XZXLCZ/2008BookOfDiscipline_Part4_GMF4XXR6.pdf
Page 102 reads as follows:
B) Marriage—We affirm the sanctity of the marriage covenant that is expressed in love, mutual support, personal commitment, and shared fidelity between a man and a woman. We believe that God’s blessing rests upon such marriage, whether or not there are children of the union. We reject social norms that assume different standards for women than for men in marriage. We support laws in civil society that define marriage as the union of one man and one woman.
The previous link was the first one I found. But it is from the 2008 edition. The 2012 edition (latest) reconfirms that same point and can be found here at the United Methodists web site.
The “official” UMC position is to NOT celebrate sodomy....though they HAVE debated it WAY too much....this appears to be a renegade group.