You are deliberately taking that quote out of context to make a stronger point. Eich gave money multiple times to particular candidates. Those candidates may be

You are deliberately taking that quote out of context to make a stronger point. Eich gave money multiple times to particular candidates. Those candidates may be opposed to homosexual marriage, but that in no way implies that Eich's donation was for the purpose of blocking homosexual marriage. Eich could have liked them for other reasons and not even known, or cared about, their stance on marriage.