Earlier quoted context omitted.
The right to unreasonable search and seizure at the Federal level supersedes all state law. This was just a bad Supreme Court decision, morally in the same "ballpark" as Plessy vs. Ferguson
Unfortunately for this argument, the word "reasonable" means pretty much the same thing now as it did in 1787, and is clearly meant to delegate most of the answer to this question to the people (in the form of the legislature), and not the philosopher-kings of the court. You will of course come up with many arguments, virtually all of which I'll agree with, that asset forfeiture is "unreasonable". The problem is that…
It seems pretty cut and dried to me that the 4th amendment supersedes any law passed in direct opposition, just like the 1st or 2nd would. This isn't a case where the courts would be making multiple logical leaps to invalidate a law they disagree with, you can describe it in 4 words "seizure without a trial", then look at the 4th amendemnt.