Why Are Tweakers The Only Bad Drug Users?

Do not answer my question if you have never done drugs in your life. I dont want to hear your “all drugs are bad for you period no matter what” BS. Someone who has never experienced any drug at all doesnt know anything beyond what the government and the media tells them, so dont answer if you havent done any.
You can hang around with someone who is stoned, you can hang out with someones whos on shrooms, and can kick it with people on acid and drunk people. Basically people arent as bad as other people think they are…except tweakers. They are worried about nothing except their meth, they will steal from you and then lie about it, they will pawn off all their stuff for their drugs, always alot more violent then anybody else on anything else. Why are tweakers so different then other drug users?