Not to put too bold a stroke on it, but it reminds me off-hand of how the formerly-feuding Pharises and Saducees made their amazing, unprecedented big-tent alliance just once in history, to oppose you-know-Who.
Card. Bergoglio, in 2007 after Summorum Pontificum, TLM within 48 hours
Forty-eight hours after Summorum Pontificum, then Card. Bergoglio arranged Holy Mass in the traditional Roman Rite.
Yet another stroke of brilliance!