Was the mob becoming more intense and dangerous? What makes you think this way?

Yes because it was growling

A mob can be both instense and dangerous

Explanation:

Contemporary forms of life bear witness to the dissolution of the concept of "people" and the renewed relevance of the concept of "multitude". Fixed stars of the great debate of the seventeenth century, and lying at the origin of much of our ethical-political lexicon, these two concepts lie in the antipodes of each other.

The "people" are centripetal in nature, converge on a general will, they are the interface or reflection of the state; the 'multitude' is plural, flees political unity, does not enter into pacts with the sovereign, not because it does not relinquish rights to it, but because it is reactive to obedience, because it is inclined to certain forms of unrepresentative democracy.