Dr. White also links to the original article on his page, and I recommend reading that article too.
I have to say, this just seems downright ridiculous. How on earth can a group who is blatantly rebelling against Christianity and its long historical beliefs decide that it wants to storm the doors of these churches in order to have them bless something that they absolutely cannot even accept as valid? Why would this activist group even care what these churches think about their relationships? I would think that they would want to stay away from the churches rather than go to them.
On the other hand, the Bible says that those who reject God's rule over them will be judged in this way. And the judgment is their perverted sexual desires ruling them and causing them to bring more judgment on their own heads. And for those who think I'm merely spouting off bigoted slander, here's the passage in question:
For the wrath of God is revealed from heaven against all ungodliness and unrighteousness of men, who by their unrighteousness suppress the truth. For what can be known about God is plain to them, because God has shown it to them. For his invisible attributes, namely, his eternal power and divine nature, have been clearly perceived, ever since the creation of the world, in the things that have been made. So they are without excuse. For although they knew God, they did not honor him as God or give thanks to him, but they became futile in their thinking, and their foolish hearts were darkened. Claiming to be wise, they became fools, and exchanged the glory of the immortal God for images resembling mortal man and birds and animals and creeping things. Therefore God gave them up in the lusts of their hearts to impurity, to the dishonoring of their bodies among themselves, BECAUSE they exchanged the truth about God for a lie and worshiped and served the creature rather than the Creator, who is blessed forever! Amen. For this reason God gave them up to dishonorable passions. [NOW WATCH THIS] For their women exchanged natural relations for those that are contrary to nature; and the men likewise gave up natural relations with women and were consumed with passion for one another, men committing shameless acts with men and receiving in themselves the due penalty for their error. And since they did not see fit to acknowledge God, God gave them up to a debased mind to do what ought not to be done. They were filled with all manner of unrighteousness, evil, covetousness, malice. They are full of envy, murder, strife, deceit, maliciousness. They are gossips, slanderers, haters of God, insolent, haughty, boastful, inventors of evil, disobedient to parents, foolish, faithless, heartless, ruthless. Though they know God's decree that those who practice such things deserve to die, they not only do them but give approval to those who practice them.
(Rom 1:18-32 ESV)
So, the Bible affirms this behavior as being the rebellion of creatures against their creator, and the extended vigor with which they pursue this rebellion is God's judgment upon them.
All this behavior coming from the extreme, radical gay activists is similar to the behavior I see from my children. Unless checked, my children will stomp their feet and deliberately disobey my commands just to spite me. They are naturally rebels. This is why it is so important to keep track of their actions and shepherd them in order that they don't end up rebelling against God and ending up eternally regretting it.
I see some gay people who are so extremely and overtly flamboyant and I wonder why they are so concerned with advertising. What I hope, though, is that we as Christ's ambassadors, who possess the only message of healing and reconciliation (II Cor. 5:20) will be willing to overlook these sinners' rebellion and attempt to befriend them in the hope that we will be given the opportunity to be used of God to pull them out of the fire and introduce them to their Savior. After all, we were all likewise rebellious sinners in need of this soul saving message, and we would be to blame and have blood on our hands if we neglected in any way to hold out this message of reconciliation for any reason--even if the sin we confront in the process makes us feel queasy.