In the end, I don't think you actually answered your original question? I'd say do what you will, and if you reject their code, they'll probably be fine living

In the end, I don't think you actually answered your original question? I'd say do what you will, and if you reject their code, they'll probably be fine living on in a fork of your project. Personally, I wouldn't mind using code from someone I disagreed with, because in the end, our common interest in a piece of software might be one thing that brings two opposing parties together, rather than divides them apart.