Believers!! Don't mislead people

[Muslim Atheism]

But what does that mean? Explain it in simple terms to an idiot like myself please.

Let go about the issue of "self" or "sectarianism". . it is global issue founds in everyone on this planet
I don't know you and there is no point for me to make you as the issue of our discussion

Okay what it means ?
It means those who have wasted their sense perception and life, and causes injustice to their life and people around them. . .

This is the condition of a Believer. . .

Indeed, within the heavens and earth are signs for the believers <- scientific knowledge etc
And in the creation of yourselves
and what He disperses of moving creatures
are signs for people who are certain <- ie. the expert
And [in] the alternation of night and day
and [in] what Allah sends down from the sky of provision
and gives life thereby to the earth after its lifelessness and [in His] directing of the winds
are signs for a people who reason
45:3-6

As we can see, Allah relates the "Believers" with scientific subjects etc
This is one of the condition to become a "Believer", they must understand the above
They must use their eyes, ears, mind, heart to understand all the above
They are the experts on those subjects, and they are able to make use of that knowledge (signs) for benefiting humanity
According to the premises in the Quran, and not for causing corruption on Earth
They are the Believers, and those who use reason

Contradictorily, the Disbelievers are those. . .

And We have certainly created for Hell many of the jinn and mankind

They have hearts with which they do not understand <- they have wasted their sense perception
they have eyes with which they do not see
and they have ears with which they do not hear

Those are like livestock; rather, they are more astray
It is they who are the heedless
7.179

These people have wasted their sense perception and life, and accordingly. . .

And whoever turns away from My direction and guidance (i.e. knowledge and science etc)
his worldly sustenance will be narrowed
and We shall raise him blind on the Day of Resurrection
20.124

and refer here: The Quran refers the actual ulema are the scientists or expert