Your first point. Perhaps you can tell me then how you can extrapolate that to explain the coming into being of the universe.....
For example:-
Due to quantum uncertainty, energy fluctuations such as an electron and its anti-particle, a positron, can arise spontaneously out of vacuum space, but must disappear rapidly. The lower the energy of the bubble, the longer it can exist. A gravitational field has negative energy. Matter has positive energy. The two values cancel out provided the universe is completely flat. In that case, the universe has zero energy and can theoretically last forever.I should emphasise that I'm not saying that this hypothesis is correct but it has the advantage of being an extrapolation from current theories and serves as an example of how the universe might not have a specific cause.
Secondly then if belief is different from knowledge then it is established by reason alone? In which case there would be plenty of reason to believe in a God of a certain type as there are reasons not to believe.
Knowledge is actually rather tricky to define and I have made no claim to it. What reasons are there to believe in "a God of a certain type"?
Since this is not knowledge some commitment to any belief has to be made.
No, this is where you continually misunderstand. There are endless stories that we could make up about (for example) the origin or cause of the universe. I don't have to make a choice to disbelieve in every one. That would be impossible anyway, as I couldn't possibly think of them all.
Some of those stories would involve something that somebody might think is a god of some sort (some would involve other fantastical beings or ideas) but why should I take those any more seriously than any other story?
We need reasons to take stories seriously.