Atheists can do meditation very well. Don't have to believe in God to meditate. Jainism & Buddhism doesn't preach God but they preach about meditation. Hinduism says you meditate & discover yourself even if no belief is there.
Intellect has a big role to play. From intellect, this urge to have the journey comes. Only through intellect you get the awareness & logic that I am not the Body, Mind or Prana, but something more.
True communist is one who cares for everybody & is free from any sorts of superstitions & narrow mindedness. It's an oxymoron if a communist says that I don't believe in something 1/2
Wrong indoctrination has led them to naxalism. Give them pride in their own tribal culture. And give then basic needs. Proper education & job opportunity will help them get out of naxal mindset.
I think every individual is a spiritual institute.
Both are essential in life. Usually I suggest the people who do lot of left brain activity, to listen to half an hour music everyday. And similarly people who are singing all the time, I tell them to solve puzzles
By how much you smile, how confident you are, how many compassionate acts you have done, how free you feel & how open you are.