We all must own the Gospel.

The walls you've repeatedly suggested that we build up around ourselves aren't healthy; they divide the children of God from each other and in that way from the love of God.

God "hopes" we imitate His Son and spread the Gospel to the ends of the earth. 

We must never treat ourselves as lepers or others as lepers.   These are just more walls.

I implore you to rethink your idea of wall-building, stopping short in the preaching and practice of the Holy Gospel.