Christians threaten to get divorced over gay marriage - Australia

I thought crazies like this only existed in the US. Seems I'm wrong. Australia has it's own waked out christians niche of society, producing two very nutty crazies. A married christian couple (straight of course) has declared they will get divorced if gay marriage happens in Australia.

A CANBERRA couple has announced their intention to divorce if gay people are allowed to get married too.

Nick Jensen, who posed with his wife Sarah on the cover of the latest issue of Canberra CityNews, writes of the Christian couple’s decision to end their marriage under the headline, “Gay law change may force us to divorce”.

“My wife and I just celebrated our 10-year anniversary. But later this year, we may be getting a divorce,” he writes. more

Curiously, their answer to gay marriage is to live in sin. Two people not married having kids and all under the same roof. 

Mr Jensen goes on to explain the divorce plan, where the pair will continue to live together, have more kids, and refer to each other as husband and wife, but will legally end their marriage because they believe “marriage is not a human invention”. more

Does that mean they're re-defining sin then? Re-defining christian morality? Surely not? I mean look at how forcefully they're claiming that you can't "re-define marriage". 

I note Jensen has in the past been employed by the Australian Christian Lobby, that dastardly anti-everything gay group of especially crazy Australian christian wackos.