Well the good Ancient Order of Hibernians kept this from happening to the Fifth Avenue parade, in NY, so , where are the defenders in Boston, is what I wonder.
This is not Mississippi, and RCs and mainline Prots are overall in favor of gay marriage, and evangelicals are relatively very few.
If you like stats:
In 2003, all major religious groups opposed same-sex marriage, with the exception of the religiously unaffiliated. Today, there are major religious groups on both sides of the issue. Religiously unaffiliated Americans (73%), white mainline Protestants (62%), white Catholics (58%), and Hispanic Catholics (56%) all favor allowing gay and lesbian couples to marry. A majority (83%) of Jewish Americans also favor legalizing same-sex marriage. Hispanic Protestants are divided; 46% favor allowing gay and lesbian couples to legally marry and 49% oppose. By contrast, nearly 7-in-10 (69%) white evangelical Protestants and nearly 6-in-10 (59%) black Protestants oppose same-sex marriage. Only 27% of white evangelical Protestants and 35% of black Protestants support same-sex marriage.
White evangelical Protestants make up 19% of the adult population today, down from 24% in 2003, and white mainline Protestants, who represent 14% of the adult popula- tion today, made up 21% of Americans in 2003. While the proportion of Catholics in America has remained largely steady during the last decade, there has been a sea change in the ethnic makeup of the Catholic population. In 2003, Catholics were 68% white and 22 % Hispanic; among Catholics in 2013, the percentage of Hispanics has grown to 34%, while the percent- age of whites has declined to 60%.
Democrats are most likely to say American culture and way of life is better now than it was in the 1950s, with nearly 6-in-10 (59%) in agreement; independents (42%), Republicans (31%), and members of the Tea Party (22%) are significantly less likely to say the same. - http://publicreligion.org/site/wp-content/uploads/2014/02/2014.LGBT_REPORT.pdf