Why do some atheists or agnostics still feel so unsecured and not in peace?

This is 100% irrelevant to Socialism and violates community standards as harrassment equating false faiths with true Atheism

Capitalist society creates alienation...

It's called moral courage -- the act of standing outside a cozy peer group like a religion, church or other social club. A mind ever questioning is not the basis of complacency or smugness that you will find with most "secure" camp followers.

I don't so, can't give a good answer, but I will defer to @pralina1 's arguments.

I am an atheist and I at am peace. I do not know about others. I know for sure that some call themselves including in here as free thinkers but they are not. Being a free thinker is an art that must be practiced, honed and mastered. Calling yourself a free thinker does not make you one.

Doubt, confusion and being unsure being to disappear as you think independently and understand more. It is just a process and that is how it works.

You're from a very religious-based nation....Bangladesh....so to doubt or question religion puts you in a tough spot. As you and your nation grows through a "demographic transition" in to an industrialized, learned nation, you'll become more secure and at peace with science...and asking questions about the "myths" that - right now - surround you.

[en.wikipedia.org]

Repeat post aka Spam

It happens mostly in the mornings . After we eat a baby or two we are fine . Secure and all .
Next .

I am Fine with it .

They want to avoid persecution,as in Salem witch trials

I don't feel insecure. Do you? And loved, like WTF?