I'll read that as "Republicans don't support gay marriage." Let me help you understand the difference between not having gay marriage and putting people in concentration camps.
When you put people in concentration camps, you take them out of society and put them all together in a big prison. People in prison don't have nearly the same liberties as people not in prison. For example, people in prison can't travel freely, because they're in prison. They can't work -- except maybe in prison jobs, which generally pay below minimum wage -- because, again, they are in prison. They have limited contact with the outside world and limited ability to interact with others outside the prison, including forming friendships and romantic relationships, because their days are spent -- notice the pattern here -- in the prison.
In a society without gay marriage, gay people lose a small tax benefit because they can't marry each other. That's about it. In contrast to being in a concentration camp (prison), gay people in this society are able to work at jobs they choose, move freely around the country, and associate freely with other non-prisoners in society.
There is a huge difference between being in a prison and paying slightly higher taxes. By not recognizing this difference and engaging in this hyperbole, you trivialize the grave injustices suffered by those throughout history who have been wrongly imprisoned and especially those who have suffered the horrors of actual concentration camps.