Knights Templar?
Do you have any proofs for that?
I only now that they used this white-black flag with a red cross pattée as a symbol.
If you make an allusion on the Baphomet, these are only assumptions.
There's no proof that this thing ever really existed, nor what it really was.
In fact it could have been also something positve, just misunderstood.
And we shall also not forget the negative propaganda which did hit the Templars after the French king started to wipe them out to gain their welth.
And I'm also sure that humans used this simple symbol even before the Templars. Just think of the Atzteks, the Mayans...