Richelieu was a great statesman, and like all great statesman, he was a very ruthless man. He's not cruel. He just does what he has to do. And in his own mind, he's absolutely right.
As opposed to getting into arguments about, well, these folks have been treated fairly so now we're going to be doing things that, very easily in the minds of a lot Americans feel like, "Now I'm being treated unfairly."
Until the mind can love, and admire, and trust, and hope, and endure, reasoned principles of moral conduct are seeds cast upon the highway of life which the unconscious passenger tramples into dust.
May your mind be thoroughly impressed with the absolute necessity of universal virtue and goodness, as the only sure road to happiness, and may you walk therein with undeviating steps.