Homophobia, noun: An extreme and irrational aversion to homosexuality.
I would say having a major problem with homosexual couples using the same word for their union as straight couple is pretty irrational, and switching your voting allegiance to a party who've made a policy to stop/reverse it is quite extreme.
Not supporting the redefinition of marriage does not make someone homophobic. Especially when we've already got legislation for Civil Partnerships. (But a policy of "all gays should be stoned to death" would have course be homophobic). To be homophobic someone must have in their heart a true hate of gays, but if they accept them for who they are and only disagree with the 'issue' of marriage, that makes them either a traditionalist or very religious.
Utter B.S.
Being homophobic isn't as binary as you make out, you can be strongly homophobic, weakly homophobic or even selectively homophobic.
By your logic someone who has no intrinsic hatred of black people and doesn't want them all killed can support slavery and not be a racist (they are a 'traditionalist' and the Bible condones it after all).
It's cop out, there are no rational reasons to oppose gay people being able to call their union a 'marriage', only homophobic ones veiled under the cloak of religion or tradition.
The religious argument doesn't hold water given most religious people, especially Christians, are more than happy to ignore the majority of their holy texts. I'll take the argument "I'm against gay marriage because of what it says in the Bible" seriously when that same person stops shopping on Sundays. Corinthians forbids women speaking church, so it's ironic seeing a female congregation member using holy texts in one to denounce gay marriage.
One's personal morals are just that, personal. Built from a lifetime of experiences and have little to do with scripture. People just fit the text to match what they already believe and opposing gay marriage has far more to do with their personal feelings on gay relationship than their respect for the wisdom of the Bible.
Saying you're against it because you're a traditionalist doesn't work either. I don't like change because I'm a person who doesn't like change doesn't really rationally explore the issue and isn't a valid reason to deny someone else equal rights.
IIRC anyways wasn't Farage's comments more along the lines of "Its not the job of government to define marriage"
Which shows his historical and legal ignorance then. The ruling monarchs and governments of yesteryear have 'redefined' marriage on numerous occasions. It wasn't that long ago that only Christian marriages were recognised.
Marriage is a legal term, it does not belong to the Church (it predates Christianity for a start) or traditionalists. It's an institution which affects the tax system, adoption, benefits and inheritance law. If it's not the government's job to address something as influential on their monetary systems as marriage is I don't know whose it is.