Well it all depends on what the subject is, if they have limited interest then that is true, many also have their mind made up and are not interested in finding themselves wrong.
There is also the "neutral point" of the equation and that is the "uncertain/I don't know yet" view. It is neither doubt nor faith but a reservation until more data is available. I would have to guess that this is Foster Zygote's position.
Doubt many times is build on experience and knowledge, I more then doubt your idea of a so-called god is right.
Often it leads to discovery. It is the lack of proof that drove many scientists and philosophers to question assumptions and to find new paradigms and discovery. Doubt is a very good thing. In fact it could be a good word to describe science and skepticism. But don't mistake doubt for a passive thing or simply rejection of orthodoxy. Skeptics don't just doubt, they continue to seek answers and not simply accept or reject current beliefs. That's the mark of science and progress.
You positive side is way to negative for me, and is anything but positive in the outlook on this universe.
No, doubt is that which destroys ignorance. It was doubt that replaced geocentrism with heliocentrism. It was doubt that pushed Columbus into the unkown.
Yes, demonstrably so. I can give many examples where doubt prompted people to find the truth.
Doubt often leads to inquiry.
I don't think it is as passive a position as you make it. uncertainty means you need more information. That can be a strong instigator to perform experiments to learn more. At least this has been my primary motivator in my work. I don't doubt or have faith in a unknown. I have uncertainty.
No, you need labels for people, I don't, denying something that isn't is just being right.
First off, whether the world was round or not was not an issue to Columbus.
One usually precedes the other.