No. They are sinners. Drugs and/or immorality makes a sinner evil.
True they are sinners, but they are soulish fallen people. Drugs don’t make people evil, they may amplify or accelerate that state, but that is who humans are without God. To believe that it is “ the drugs” that cause them to do such things is naive. There are many many people that do evil things that are not on drugs.
I think many people do not want to come to grips with the thought that people are capable of heinous behavior,because it unnerves their world view. The world view that says... “I’m not a bad person, so other people cant be all that bad”
Jeremiah 17:9 The heart [is] deceitful above all [things], and desperately wicked: who can know it?