It seems apparent to me that those who would be the most upset by the sign would be rabid Christians. Therefore reminding them that they [most likely Christian] broke a commandment of the very religion they are claiming to defend by stealing that sign is on point and brilliant. It's called using your critics words and beliefs against them. It's a great debate tactic and Carlson's only comeback to it is to claim that Atheists have no right to use the ten commandments because Atheists don't believe in them? That's a nice dodge from the point of Christians stealing despite being commanded NOT too.
So in other words Christians can break the commandments when dealing with Atheists because Atheists shouldn't have the same rights to freedom of expression as Christians enjoy. In part too because Atheists are seen by extreme Christians as evil to be defeated by any means necessary and therefore (to these type of Christians) the end justifies the means (i.e. stealing). It's not too unlike radical Muslims who think "God" will bless them in heaven for killing the nonbeliever because belief in "God" is more important than free will and the commandment against killing. Thus we see that many radical Christians don't actually believe following every commandment by the letter as they often say they do.
Michelle Maulkin actually takes the high road for once in basically saying "Just ignore them." But Carlson is completely freaked out to the point of saying that if they treat them as equals then Christianity might disappear??? Come on. Honestly. It might disappear from the public square (as it should according to the Constitution) but Christianity is not going to disappear from a country [America] that is beyond any measure predominately Christian. Besides, where is their faith that "God" won't let Christianity die out in America?
And should it be about control? Shouldn't your belief in Christianity be personal? Isn't it more about your own salvation than about being the dominate belief system to maintain your feeling of superiority as being "number 1?" I'm a Buddhist and we are no where near the dominate religion in America and I don't care. I don't practice Buddhism so that maybe one day Buddhism can dominate America. I practice it because I find meditation to be helpful in my daily, personal life.
I am a weak Atheist/strong Agnostic, I know many other Atheists and for most it's not about abolishing Christianity but rather about equal representation in the public square. Either everyone gets to have a display or no one should as the public square belongs to everyone and public/government buildings/locations are paid for by everyone--not just Christians. It seems really simple and basic to me.
~Peace to all beings~