Liberty the Victim in 6th Circuit Ruling

I don’t understand this 6th Circuit Court ruling on ObamaCare at all. Haven’t read the whole thing yet, but a one bit stands out:

“The provision regulates active participation in the healthcare market, and in any case, the Constitution imposes no categorical bar on regulating inactivity.”

Even one-time visiting constitutional law lecturer Barack Obama understood that the Constitution is a “charter of negative rights.” But the 6th doesn’t seem to comprehend any limits to federal power, which seems to be saying, “That which is not mandatory is forbidden, comrade.”