You keep saying that, but you never actually addressed a single one of my criticisms.
I am addressing your conception of science. If you have a decent hypothesis for an observation, the hypothesis, by definition, will explain why we see the observation. Furthermore, science throws out hypotheses that are not falsifiable, as they are pragmatically unable to be used and including them would lead us to have to include any possible statement, no matter how absurd (for example, it would allow defendants on trial for murder to say "An alien created a body double that did the murder. You can't prove it false, so you must find me not guilty."). Simply positing a hypothesis and saying it explains our observation doesn't mean anything on its own in science.
Let us look at the observation you initially provided:
People show certain behaviors (acting certain ways, refraining from certain foods, dress, and activities, performing certain rites and activities like reading holy texts, etc.) that they attribute to God.
What are the hypotheses we need to consider? Honestly, I'm having a hard time formulating a testable hypothesis for your position, so I'll simply go:
H1) God exists and indirectly causes people to believe in God, therefore causing people to behave on those beliefs (our observation).
We can consider this against the opposing hypothesis:
H2) People believe in God, therefore causing people to behave on those beliefs (our observation).
The main and obvious difference is that H1 requires God to exist, while H2 is indifferent to the existence of some conception of god. In order to show God exists scientifically, H1 must be true. Scientifically, in order to show H1 is true, you must falsify H2, and vice versa. In order to falsify H2, you must illustrate why H2 cannot account for some other observation that H1 explains. In order to falsify H1, I must show that the actual existence of God is irrelevant to the belief fueling their behavior.
I can easily falsify H1. We know that there are adherents of mutually exclusive religions that behave in different ways and believe in different conceptions of God. The god of Christianity has Jesus as full man and full divine and does not have Muhammad as a prophet. The god of Islam does not have a divine Jesus, but rather a prophet Jesus and a prophet Muhhamad. Christianity and Islam have different practices, theologies, and gods. Only one is right. Therefore, I know that there is a group of people who belief in a god that does not exist. However, does the nonexistence of their god prevent people believing in it and practicing its tenets? Clearly not. Therefore, H1 is false. God's existence is not required to explain the observation of religious practices and belief, as people can act on false beliefs. Therefore, H2 is true.
Now, H2 does not state that God does not exist. God may exist and may interact with humans in some form, thus causing those beliefs to emerge. People might be completely justified in their belief in God and may even be correct. However, the existence of God is not required to explain the observation; mere belief is all that required, regardless of the actual existence of God. Therefore, observing people behaving a certain way and attributing it to God is not scientific evidence for the existence of God.