As I mentioned below, you have confused discrimination with punishment. Eich is not being discriminated against, he is being punished. He lost his job because the people he worked for and the customers of his company's product did not want his as their CEO.
If he never works in the tech industry again because he is a shunned pariah, then that would probably be discrimination.
In the sentence I quoted above, you wished that anyone who donates to an anti-gay-marriage campaign (or similar) will be prevented from occupying an executive position of any company in the future. That sounds more like discrimination than punishment, even according to your own definition.
No it sounds perfectly consistent to me. Anyone who discriminates against any class of people should be rightfully suffer the consequences of their views.
If they recant their discriminatory views, I have no problems supporting them. Gay people do not have the same luxury of changing who they are.
If he never works in the tech industry again because he is a shunned pariah, then that would probably be discrimination.