The Peasants Revolt vs. The St. Bartholomew's Day Massacre

Over the years I've come across a number of Roman Catholics using Luther's harsh comments towards the peasants as means of discrediting him.  I've covered this a lot of the years, for instance:

Luther and the Peasant's War

Luther and the Peasants Revolt

Luther: I Have Slain all the Peasants

Luther: Peasants are no better than straw

I'm looking forward to the next Roman Catholic I come across doing this, because this is what I'll be responding with.

St. Bartholomew's Day massacre happened in 1572. Though that massacre included "Roman Catholic mob violence," this isn't what I find interesting. Rather, it's the following from Alister McGrath:

Protestantism’s prejudices against Catholicism were reinforced by the bizarre reaction of the papacy to the massacre in France. Gregory XIII’s celebration of the massacre was as jubilant as it was undiplomatic: the bells of Rome rang out to mark a public day of thanksgiving, the guns of the Castel Sant’ Angelo were fired in salute, and a special commemorative medal was struck to honor the occasion. Gregory even commissioned Giorgio Vasari to paint a mural depicting the massacre. Such tactless actions could not fail to produce a reaction of total distaste and disgust, and the 'anti-popery' that subsequently spread throughout Protestant regions of Europe remained a persistent element of Protestant self-definition until very recently. [McGrath, Alister. Christianity's Dangerous Idea (p. 131). HarperCollins. Kindle Edition.

Now, here's a little background on Gregory XIII, compliments of the Catholic Encyclopedia. Most remember him as the pope that strove to reform the Roman church. That included "trying to depose the queen by force of arms." And also:

His youth was not stainless. While still at Bologna, a son, named Giacomo, was born to him of an unmarried woman. Even after entering the clerical state he was worldly-minded and fond of display. But from the time he became pope he followed in the footsteps of his holy predecessor, and was thoroughly imbued with the consciousness of the great responsibility connected with his exalted position.

Interestingly, the Catholic Encyclopedia attempts to defend Gregory over the 1572 massacre, arguing "...he was probably not acquainted with the circumstances of the Parisian horrors." Why sure... that's why he had this painting commissioned (shown above). The author of the link previously cited claims the painting still hangs on wall inside the Vatican (I'm not sure whether that's true or not). Probably the most interesting stretch from the Catholic Encyclopedia is that "But even if Gregory XIII was aware of all the circumstances of the massacre (which has never been proven), it must be borne in mind that he did not rejoice at the bloodshed, but at the suppression of a political and religious rebellion."