Can someone explain criticism #6 to me? 

This is taken from the criticisms section of the article:

6. Since logic is inherently constant, and that some things are more true than others, it means that "strong" relativism cannot hold true under many conditions. Relativism often ignores how views have different weight to another. An example of a similar phenomenon is the Gay Marriage debate in the U.S. - an example where the majority dictates the rights of the entirety even when it doesn't apply to them, as they do not weigh up the effects of their views. 

Can someone explain what exactly this means? 
I do not follow the first half of the paragraph (the one that actually pertains to relativism), and the example reads as complete nonsense to me, especially this part:

"...the majority dictates the rights of the entirety even when it doesn't apply to them, as they do not weigh up the effects of their views."

I do not think that:
a) The majority in question believes that "it" doesn't apply to them. (Though I'm not sure what "it" is in this context, so the sentence may be true.) The majority believes that allowing gay marriage would undermine the moral standards of their society, which, of course, applies to everybody in that society.
b) The majority in question does not "weigh up the effects of its views". Its views are that gay marriage should not be allowed, for the benefit of society; it is aware of the effects; and does not object to them.