You don't owe your loyalty to someone just because they happened to be useful in the evolution of your thinking. You can be glad you found something of use & move the fuck on.
As previously stated, plenty of marginalized folks (Black, indigenous, queer, disabled, etc.) have more to offer to you, especially if you bring it all together.
Even there though, don't fucking idolize people. There is no amount of "good" someone can do that should shield them from accountability for their own actions.