Let’s put it this way. You think I want government to favor certain group of people like Nazi. To the opposite, I want elimination of all such laws. It’s everyone else that’s like Nazi. I am the opposite.
Look at your cell phone. There is no law that require you to buy the best cell phone. You, out of your selfish interest, want to get the best cell phone for the price you want.
Cellphone producers that get more sales, make more profit, and will produce more similar cell phone.
Namely, genocide against those who don’t feel like getting married.
Imagine of some countries prohibit commies/non commies, or any specific group of people as unfit to reproduce. Then we would consider that a genocide.
Imagine if that country start stoning commies/non commies, christian/non christian, muslims/non muslims, for reproducing (or attempting reproducing 
). Then it would be genocide.
Even if members of those oppressed group can simply switch, they may not feel like switching.
What about those that don’t feel like getting married?