It is important to understand, he isn’t talking about flooding the United States with drugs. The drug cartels are in league with hezbollah, hamas, al-queda, and isis.
Mexico government is not an ally or friend of the United States.
Exclusive — Ret. Lt. Gen. Flynn: Terror-Linked Nations ‘Cutting Deals’ with Mexican Cartels to Enter U.S.
http://www.breitbart.com/national-security/2016/08/26/exclusive-ret-lt-gen-flynn-warns-terror-linked-nations-cutting-deals-mexican-drug-cartels-passage-u-s/
They are already flooding our country with drugs. Heroin is cheap and plentiful and easy to get. You can’t turn on the TV or radio without hearing about the ‘opioid’ epidemic...which is really a heroin epidemic...but the PC crowd can’t allow the epidemic to be linked to the heroin pouring across the wide open border.