I disagree. We need to take liberty and freedom in whatever increments we can get it, and a Federal law telling two people who love each other they are not allowed to marry one another if they choose to does not increase freedom or liberty no matter how you slice it.
The approach of saying, "Instead of letting people do what they want, we need to get government out of marriage completely" is the equivalent of saying,
"I think Rosa Parks should've shut up, sat down in the back of the bus where the law said she was allowed to, and then instead of fighting for the freedom to make her own choice as to where she is allowed to sit, she should've started a campaign to END PUBLIC TRANSPORTATION ENTIRELY. Because getting the government out of transportation is by far the more important, bigger issue. What a wasted opportunity to increase Freedom and Liberty!"