Discrimination as understood in the modern context is when one group of people is unfairly treated in relation to the general public.
If it costs $3 for a value meal at Burger King for the general public, but the employees are instructed to charge extremely overweight people an extra $2, that would be discrimination.
By the way, there would be a good reason for this discrimination. Burger King might be trying to encourage people who are extremely overweight to eat less fast food. But nonetheless this would be discrimination.
But, if everyone is charged an extra $2 then that would be Burger King policy and not discrimination.
Likewise, the laws that are being called "bans" are not really same sex marriage "bans" or gay marriage "ban" but instead positive statements about the law.
Every person is treated alike. In order to get a valid marriage certificate, they must marry someone of the biological opposite gender.
The trick is that gays have defined themselves as an aggreived civil rights group. Which I disagree that they are. They are a group of individuals who choose to engage in certain sexual activities. They are no different in terms of the law than a group of people who like to eat a certain food.
That they claim some or all were born that way is not material. The issue is that we the people through our society have a right to determine which behavior is preferred or not.
Marriage is a civil institution based on various behaviors and commitments.
No matter what you think it should include, there are some people or circumstances that won't qualify.
Certainly, we have the right to make rules. If you disagree with the rules, that doesn't make it discrimination and a civil rights case.
There's not a person alive who agrees with every aspect of every law. Yet, we can't form communities and turn every issue into a civil rights case that must be remedied.
We have the ability to decide what is real and not.