No.
Becuase the op-ed is making the assumption that those that are vehemently against government are violent in nature and willing to take the lives of innocent Americans to make their point.
Did you read the original piece or the Examiner interpretation of the original piece? The opinion piece made clear that most people that belong to these anti government groups are not willing to take American lives and are just (like a shitload of people here) bloviating.
If the anti war groups were heavily armed and spoke frequently of revolution and civil war, would you want them monitored a little more closely or not? What if they were those hyper nutbag environmentalists that were stockpiling, oh say, tree spikes...would you want that looked into?
Which was pointed out in the Op Ed.
Terrorists openly threaten American lives.
And we have had plenty of them born, raised, and trained in America (some in the US military)