One of the founders, Brendan Eich, donated his money to take away the equal right for same-sex couples to marry in California (Prop 8). He never acknowledge that it was mistake, so I can only assume that he truly wants to see the marriages of same-sex couples erased, which is quite a hateful thing to desire.
I think most leaders of companies apologize and take ownership when they publicly screw up. The problem in Eich’s case is he doesn’t think it’s wrong to strip same-sex couples of their equal right to marry, so he felt he didn’t need to apologize for helping to make that happen.