ok here's a shitload of sources that say the knights templar were crusaders, I mean take your pick, they absolutely were crusaders so any source about them is going to say they were crusaders

https://en.wikipedia.org/wiki/Knights_Templar
http://www.history.com/topics/the-knights-templar
http://www.newadvent.org/cathen/14493a.htm
https://www.britannica.com/topic/Templars

and the wikipedia article about the crusades, since you apparently don't know what the crusades were (spoiler: it's where christian knights invaded the middle east and slaughtered muslims trying to take their land)
https://en.wikipedia.org/wiki/Crusades