Got us paranoid, stepping out very cautious
The same way we holding guns, nuns carry crosses
Forms of protection against the evil forces
Of course there's subjections, in your cerebral cortex, the demons

from Elzhi – D.E.M.O.N.S. Lyrics on Rap Genius

Meaning

El gives justification for the amount of violence and paranoia, claiming that it is needed to protect against the “evils”

He then makes the comparison that a Nun, who pledges their life to religion, holds a crucifix just a frequently as his people hold a firearm.
In other words, almost always

But, El then claims that their is a deeper reason for this violence that lies in your mind, which might be the origin of the true demons

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