You can't just make assumptions like people believe in God because they don't understand science. I dare say that I understand science and I believe in God.
Perhaps I have generalised.
A lot of people, today (and the last 600 years), understand science, whether they followed their religions or not. But only those who have receive the education in relevant fields of science, and can distinguish what is science and what isn't.
But the people who wrote the individual books of the OT & NT didn't. The Church Fathers who wrote about Jesus and earlier church also didn't have knowledge of science.
The problem lies with people who believe in interpreting scriptures literally, as if they have happened, like the creation (1 - 3) and flood myths (6 - 8), and the genealogy (10 - 11) in Genesis, God's reply in JOB (38 - 41), the various prophecies from prophets, Jesus' birth (Matthew 1 - 2 and Luke 1 - 2), and worse of all the Revelation. Anyone who think any of these have literally occurred, showed that believe in superstitions and make-believe; they certainly don't believe in science.
There are many more who don't have the education, particularly in science, who believe in the bible (or the Qur'an), but that's mainly because the infrastructure to education are substandard.
But there are places in the US, in which they have the education to science, but the creationists and theists there, who rather believe in the superstitious creation myth or intelligent design than in science.
This is largely the result of the Protestant churches in the US, and the JW, in which they indoctrinated people with illogical nonsenses from the bible.
The difference between the Abrahamic faiths and those mythologies is that the Abrahamic faiths believe in an omnipotent God whereas those mythologies believe in gods and goddesses with limited power.
That's based on personal belief or taken on as blind faith...which amount to the same things as non-Abrahamic religions - SUPERSTITION.
Seriously, how do know that the Abrahamic deity is omnipotent?
Because of the scriptures or the teaching of respective religions?