With god going before us . . we may . . deliberate and discuss . . whatsoever is needful for repelling those assaults of barbarians and infidels, with which they seek the overthrow of all christendom. what is the quotation most likely about?

It is about  a refusal to accept the spread of Protestantism

Explanation:

This quote is from the "The Canons and Decrees of the Sacred and Œcumenical Council of Trent"

The Council of Trent was the formal Roman Catholic reply to the doctrinal challenges of the Protestant Reformation. It served to define Catholic doctrine and made sweeping decrees on self-reform, helping to revitalize the Roman Catholic Church in the face of Protestant expansion.

no because it could make the world a terrible place to live in.