Here in my state (I’m sure some quick Googling can tell you which it is) we did decriminalize drug use. However, we provided no additional rehab support, even though that was what the bill said we would do. Didn’t happen.

That sounds like the policy was sabotaged and that Oregon's outcomes shouldn't be used to shoot down similar policies elsewhere.

appears to be coming from China, in an attempt to destabilize our society

American pharmaceutical companies are purchasing fentanyl, and American doctors are prescribing it to patients. From there, it is sometimes re-sold as a street drug. This is not a Chinese conspiracy, nor the mirror of the opium war you seem to think it is. The British empire forced the Chinese to engage in the opium trade at gunpoint. The Chinese are not doing this to the Americans. America is destabilizing itself just fine.

Cheap Fentanyl, which is an order of magnitude stronger and more deadly than heroin, appears to be coming from China, in an attempt to destabilize our society

it is more likely the case that it's being sold because it has a market and generates profit

but yeah that doesn't sound ideal. Drug use is a real problem and drugs are in fact bad for their users and society. Really you would want some sort of program to get people off of drugs