As of 2014 the United States government recognized THC as a cancer killing agent. When will the oppressive hypocrisy end-

You are not going to cure any cancers with THC alone.

THC is marginally active as tumor suppressor, in fact CBD (cannabidiol, which is considered non-psychoactive) is slightly better at suppressing tumor. However, a combination of THC-CBD at low dosage, together with irradiation is considerably active at tumor suppression.

Wai Liu is a senior research fellow at St George's, University of London:
"Our results showed that the dose of irradiation we used had no dramatic effect on tumor growth, whereas CBD and THC administered together marginally reduced tumor progression. However, combining the cannabinoids with irradiation further impeded the rate at which tumor growth progressed"