It's kind of absurd to see this sort of contradictory reasoning.

I think there'd be outrage if it was suggested that some employee of some company should be fired just because he chose to spend his own time and/or money supporting a pro-gay cause.

Yet as we've seen in this case, it's apparently deemed perfectly acceptable by those who'd be outraged in the other case to level the exact same kind of discrimination against somebody who supports an opposite viewpoint.

I can't see how such contradictory behavior will help garner support. Fighting discrimination with discrimination is self-defeating.