if the Fed's are conducting raids in Colorado where recreational use is 100% legal they are breaking Colorado law and are getting their heads stuck in a rabbit hole that they may never be able to dig themselves out of.
I see what the problem is. You don't understand our form of government and how it works.
States are sovereign; the federal government is sovereign. This is known a dual sovereignty.
However, the states surrendered a portion of their sovereignty when they became states. This is known as federal preemption. What that means is that when federal laws and state laws are in conflict - the federal laws win. It is more complicated than that, but I am trying to give you the simple version.
How does this apply to the drug situation?
A state may have no penalties for drug possession or use. That is a factor of the state sovereignty. The federal government may have a law banning drug XYZ. That is a factor of federal sovereignty. The state cannot repeal the federal law. The feds cannot repeal a state law. (A court can still find either unconstitutional but that is another lesson).
If something is illegal under state law that is not illegal under federal law, the state can prosecute, but the feds cannot. If something is illegal under federal law, but not illegal under state law, the feds can prosecute and the state cannot. (Again, this is more complicated than this graf presents but the essence is correct.)
If something is illegal under both federal law and state, then either or both of them can prosecute. Yes this can lead to two trials for the same offense and not be double jeopardy because each entity is sovereign.
The confusion that some people have regarding drug legalization and sovereignty issues is that the feds do not have the manpower to police the states. When the state is not compliant, the feds pick different targets. This means you could conduct yourself in a manner that is "legal" under state law, illegal under federal law and not get busted for years if ever. It also means you could draw federal attention at any time and have the hammer of government smash you to a pulp.
Civil asset forfeiture is one of those tools. The feds come in and seize those businesses -- which were acting lawfully under state law -- for violations of federal law. The local police assist because they get paid. Then under equitable sharing, the feds kick 80 percent of the seized assets back to the local police. The local police get to buy a discounted armored vehicle from the feds with seizure money and send their seizure team to Hawaii for training and pay overtime and bonuses. The state gets to pocket new license fees when the next "legal" business steps in to fill the void.
The druggies keep getting the product they were getting and different cartel reaps the profits.