Situational ethics do not apply here.  My ethics are strong and impervious to the situation at hand.  Conservatives used a sinner (Trump) to accomplish their goals.  We understand that we're all sinners, period.  Pope Francis is a sinner, like all of us, and the Church is using him to accomplish its goals.  President John Kennedy was a sinner and the nation used him to accomplish its goals.  God often uses us to accomplish His goals, and we're all sinners.  No difference.