Using comma to set off clauses that are not essential to the meaning of another clause that is not essential of the meaning of a sentence

I was wondering if it was allowed, and how to distinguish which clause or sentence a clause is adding a nonessential information to.

Let’s use the following example:

The windy streets, that have been torn apart by the demons(1), strangely reminiscent of the barbaric men this country has defended for years(2), have been rebuilt from the ground up by the new government.

(1) complements the windy streets have been rebuilt from the ground up
(2) complements that have been town apart by the demons

Is this allowed? Is there any way to make it clear which clause a clause is complementing?