No, they said that when they first made Marijuana illegal, in 1936. The even made a propaganda movie at the time called "Reefer Madness", that spread the belief that MJ made women wild for sex and made black men so wild for sex that they would rape your white wives and daughters. Aren't you a little embarrassed to keep up the war on drugs that had such a dishonest start.
Dishonest? Maybe "ignorant" is a better word for it.
But, call it what you will. It in no way explains the rationale for the passage of the Controlled Substances Act of 1970.