Brian Brown, the president of the National Organization for Marriage (NOM), has suggested gay rights groups were in part complicit in Wednesday's shooting at the Washington DC headquarters of the Christian conservative group Family Research Council (FRC).

Twenty-eight-year-old Floyd Lee Corkins allegedly walked into the group's lobby and shot the security guard before he was wrestled to the ground. The guard, identified as Leo Johnson, was taken to a nearby hospital and is in stable condition. An FBI spokeswoman said he was shot in the arm.

Corkins, who previously had volunteered at a local gay community center, reportedly criticized the group during the altercation.

Brown, whose group actively opposes gay marriage, blamed the shooting in part on the rhetoric of gay marriage supporters, and in particular the Southern Poverty Law Center (SPLC) which last year labeled the FRC a hate group.

“Today's attack is the clearest sign we've seen that labeling pro-marriage groups as 'hateful' must end,” he said in a blog post.

Appearing on CNN, Brown denied that the FRC's rhetoric is anti-gay or hateful.

When CNN anchor Soledad O'Brien quoted the FRC as saying, “One of the primary goals of the homosexual rights movement is to abolish all age of consent laws and to eventually recognize pedophiles as the 'prophets' of a new sexual order,” Brown denied that the statement was hateful.

“Just because you disagree with that statement, you should argue with it. By no means can you say just because of a statement like that this is the same as the KKK or the Aryan Brotherhood. That's totally unacceptable.”

“Saying it's spewing hate and that we are therefore going to label you a hate group, that's totally irresponsible. … This tragedy highlights how irresponsible something like this is,” he added. (The video is embedded on this page. Visit our video library for more videos.)