Actually, the Inquisition tended to be a Dominican turf (Fra Tomas de Torquemada, OP) and occasionally a Franciscan one (Cardinal Jiminez). I suspect that tales of assassination of monarchs are apocryphal. Most Jebbies have deposited their balls in a leftist lockbox since the mid-1960s. Regrettably, they are not alone in that respect.
James I might of had an argument with that assessment of Jesuit threats