He previously worked against gay people's civil rights. When questioned about that, he promised that at work he wouldn't do that. But he has conspicuously avoided any substantive statement about his donation or whether he'd do something similar in the future. So there's no conjecture here, just a rephrasing.
Do you actually have a source of him saying that? Or are you basing it solely on his political donation?
If that's the case, you're engaging in nothing more than pointless conjecture.