Yes, and liberals such as myself contend that marriage is a human right. If tolerance means allowing gay individuals to have human rights, then they must have the right to marriage.
When was the last time basic human rights required a license? Driving a car requires a license and most people would consider it not a right but rather a privilege with a specific set or requirements. Both marriage and driving have "age" requirements and marriage used to have very specific test that you had to take (blood tests and record searches).
So tell me again, how is it a basic human right? Can you marry multiple people without first divorcing a spouse? No? That does not sound much like a right to me.