The "Church" has perpetuated more atrocities on mankind than anything other than, maybe Communism.
They used to just exterminate their opposition.
And yes, they did lie about the Templars....while they were exterminating them.
Not even close, pal. Not even close.
You are probably getting the Cathars, mixed up with the Templars, (a common error, yet odd, no apparent historical link.)
The Templars were not exterminated, their leaders were executed by the King of France. The others, disbanded by the Church, were sometimes ordered to do penance, but otherwise reassigned to different forms of religious life.
Many Templars didn't like this deal, and fled. A minority went as far as the Islamic world, where they lived on as advisors to Sultans. In Spain, although the order was supressed, the Church gave them pensions.
Yeah, in two millemmia, there are bound to be a few bad apples.
Communism, on the other hand, has achieved so much more in so little time, and little, if any, good has come from it.