Francesco de' Pazzi. Brought up as a noble in a city captivated by the newly rich Medici family, Francesco was taught to hate the middle class and its social climbers.
Dismayed, he watched as the Medici bank eclipsed his own and centuries of influence over the Florentine government slipped through his fingers. It looks like the Spaniard offered him a solution.
Rather than compete in something as dirty as banking, Francesco only had to do one thing for the Templars, one thing to put the middle class in their place for good: Kill the Medici. Giovanni Auditore tried to stop Francesco by putting him in jail, but the Templars took care of that.