Actually it does have a lot to do with the Fugitive Slave Act for the purpose of comparison. You state that, "England has the right to set their laws on their antiquities". As it relates to the law, "antiquities" are property. In 1793 in the United States, slaves were property. So just as "England has the right to set their laws on their [property]", so does the United States. Which they did. And as @Jason in Enid stated, "Gov't law does not equal moral". So I ask again, would you have violated or adhered to the requirements of the Fugitive Slave Act?
I can't argue with the basic facts of what you say. But neither does it have anything to do with the morality of the law. Jack Miller was a terrible example to challenge the law that prohibited sawed-off shotguns because he was a criminal. But that didn't change the fact that the Supreme Court ruled that in order for a firearm to be protected by the 2nd Amendment it must have a military use/function, and no evidence was presented at his trial to support that. Had Miller not gotten himself shot up and killed before the case could be reheard, such evidence would have been presented and sawed-off shotguns would be legal, which would have on balance been a good thing. Not only do they have a military purpose as a close quarters weapon, they are excellent for home defense or when being attacked by multiple attackers.
Had the Vikings not raided Europe, they might not have taken women back north and we might not have all the hot northern European women we now see in Scandinavian countries. I'm in the group that colonialism was a good thing in the past, and served the world very well. Imagine what the world would look like today if Columbus never came to the Americas and the United States never existed. The world would still be a hell hole.