...Who are we to say that it was God? I think saying that it was in fact God, and saying that you believe in God are two different things.
The strength of a conviction does not necessarily make it more true.
Kind of funny how a moment ago were saying that we should rely on "data", now you're saying that we should rely on "experience".
I wouldn't say her "rationality broke down", that's actually kind of a disturbing way to put it. It was more that she had a strong belief or a faith in aliens existing, but she couldn't "prove" it. And it's this faith that drives her.
I think that's kind of the point of emotions. It doesn't really have any kind of rationale for it existing, but it exists for the sole purpose of driving you into an action.