Is God Nice?

Alan Jacobs considers Philip Jenkins' call for interreligious dialogue:

What always fascinates me about these arguments is that, in their focus on how proponents of different religions can get along, they invariably forget to raise the issue that for most religious believers is the central one: truth. If “intolerance” of other religions means denying that they are equally valid means of accessing the divine, that’s only a bad thing if all religions are equally valid means of accessing the divine but that is just the point at issue. The constant and never-questioned assumption of people like Jenkins is that, if there is a God, that God will be tolerant and open-minded and accepting of a great variety of ways of trying to get to Him or Her or It. But as far as I can tell, the only reason for believing in so all-embracing a God is that we’d prefer to. Looking around at the world the natural world as well as the human world I do see some reasons (none of them definitive, of course) for believing in a God, but I don't see much warrant for believing in a God who is nice.