Unfortunately this is going to happen no matter what traditional value is being "devalued" because people who stick to traditional values tend to be the sort to not actually have anything resembling conscious thought on the matter. They were raised to view it as the correct way of going about things and never stopped to think about the why of it being done that way or why it is or isn't wrong to do it another way.
I didn't follow the TV coverage, since I hardly ever watch TV (just crap running anyway), but I followed the print media. Most of the published letters from the readers where... well I'd go with "interesting". While I personally appreciate opening the marriage to same sex couples - especially since they now have the same rights as "traditional marriage partners", I have absolutely no problem with ppl not liking this. BUT: If they talk about it in public, they'd better have some GOOD arguments. But there was not a single argument I've read, that would have withstood any close examination at all. And I think that's the point: Ppl don't know what they are talking about, they are afraid of new things and like sticking to traditional things. In Germany we have a proverb: "Was der Bauer nicht kennt, frisst er nicht." I don't know if there is a similar proverb in English, but it roughly translates to "What the farmer doesn't know, he doesn't eat." Meaning someone is not open-minded towards new things and and prefers the one with which he is familiar. We had this discussion long enough in Germany. And since the world didn't stop turning since we had same sex partnership in 2001 I think it's time to force ppl to deal with the situation. Even if that means forcing them by law.
That's more or less how it went here in Canada (well, except it happened longer ago and it was the Supreme Court--the actual government never had the guts). I think the thing is that all the fearmongering gives the impression that somehow it's going to have a huge impact on . . . something . . . but then when it happens, since it actually has zero impact on anyone except the people getting married, it's hard for the haters to really point to anything. I suspect there might even be an effect where the fundies prefer to think about something else so they don't have to notice how wrong they were.
I don't know if it's the right way, but I think I prefer the way it happened over here:
We had life partnership for same sex couples since 2001 and people had time enough to get familiar with the whole concept. There were some political parties and non political organizations that wanted to open the civil marriage for same sex couples right from the beginning and where working towards it ever since. But after the CDU with chancellor Merkel was in administration since 2005 it never came up again. The CDU (conservative party) wanted to keep the status quo with the partnership but was actually forced by the Bundesverfassungsgericht (something like the supreme court) to give same sex couples more rights (like finances, taxes, and so on) since the Bundesverfassungsgericht made it clear that if same sex couples have the same duties, the also must get the same rights. But it was small steps over years, so no one of the people in Germany was actually forced to think about the whole situation. Like "Oh, they got some more rights? Yeah whatever. It's ok.". But a few weeks ago on a Monday Merkel went to a talk show and someone in the audience I think asked her about same sex marriage and she said she'd prefer for our members of Parliament to vote for their own and not for their party. It took all other parties in government about a day to set up a vote on Friday the same week.
I mean... they talked about it for 16 years and then just did it in a week. It was absolutely amazing and I think this was so damn quick, people didn't have enough time to think, let it get to them and form actually some kind of organized resistance. When they actually realized what was happening, the law was already signed by the President and put into effect starting in autumn. And now it just like "Yeah... what can I do... eh, I don't care." (Of course it helped, that about 73% of the German people was for the law in the first place ^^)