To me, it hinges on what is meant by "believe in." I think that the more important meaning of "believe in" goes beyond the shallow "I believe this is ontologically real" and dives into "I believe in this; I want to cultivate a relationship with this to show my respect and devotion." That meaning of the phrase "believe in" carries weight and substance - it impacts how you behave and has ramifications for your way of life.
I already believe in the Abrahamic god in the shallow, ontological sense. But I do not believe in that god in the deep sense. I doubt if any amount of evidence or character would alter that. I already have gods I want to cultivate relationships with.
To use an analogy, imagine that you've got a particular style of cooking you really enjoy. It's unabashedly your favorite, and you never get tired of it. Then someone says "oh hey, how about you try this dish from this other culinary tradition?" You might try it, but you might not - depends on how much you like exploring other traditions. Whether or not you try it, you still have your favorite... and that favorite is not this new thing you tried. You keep to your cooking preferences because you know what you like and it works for you.