Modern Cannabis is in fact more powerful than hash was as it was a way to concentrate the original weak Cannabis effects.
I'm too lazy to research it right now
you should spend some time in a search engine. Here is the Wiki info and it appears we both had the spelling wrong.
Wiki Article
The Hashshashin (also Hashishin, Hashashiyyin, or Hashasheen) from which the word Assassins is thought to originate, were the military wing of the Nizari branch of the Ismā'īlī Shia Muslims following a dispute regarding the succession of the eighth Fatimide Caliph Al Mustansir. The Nizāriyya, upheld Nizar to be the rightful successor but the faction were driven from Egypt. However the majority of Isma'ili outside of the Fatmid State believed that Nizar was the rightful successor, and established a number of fortified settlements in present day Iran, Iraq, Syria and Lebanon, the first of which was Alamut under the charismatic Iranian leader Hasan-i Sabbah. Persecuted as infidels by the dominant Sunni sect in the Muslim world, they sent dedicated people to eliminate prominent Sunni leaders, whom they considered "impious usurpers."[1] [2] The sect was decimated by the invading Mongols, their last stronghold being seized by Hülegü Khan in the year 1272.
The term Hashshashin, a name given to them by their Arab enemies, was derived from the Arabic "haššāšīn" (حشّاشين, "hashish user"). It also means the ones who produce hashish, which they are alleged to have ingested prior to their attacks, but this etymology is disputed. The sect referred to themselves as al-da'wa al-jadīda (Arabic:الدعوة الجديدة), which means the new doctrine, and were known within the organization as Fedayeen.
It appears the connection to hash may be false.
When I attended college in the late 60's and early 70's the History Major's were some of the biggest stoner's on campus. They are Professors now so perhaps it is wishful thinking on their part?

