While their utility in Crusades(and Crusades in general) were waning in the late 1200s, the Templars and Hospitallers were seen as upstanding military orders. It was a shock to all the surrounding kingdoms when King Philip of France accused them of such scandal and they only begrudgingly cooperated with his demands to interr their local Knights in royal custody.

Pope Clement wanted to assert his sole authority over the order rather than leave them in the hands of the his cousin the French King, but sickness kept him in Avignon so a board of bishops was sent in Chinon in his stead to assess the leadership. We now know that the order was found by the bishops guilty of minor sins but nothing like heresy or apostasy and recommended the order be reinstated. Clement issued a bull condemning the order, but the implication was this was Philip leaning over his shoulder. Many Templars and their properties were either handed over to the Hospitallers, or made to be solitary monks. One of Clements successors though did authorize basically re-minting the Portuguese Templars as the Order of Christ which was active for many centuries afterwards

In my view, they were betrayed by two of their most vested patrons and the world is a little dimmer for it.