However, I also suspect that most of the people who would participate in beating the anti-Christians (or applaud those doing the beating) would also be the same ones most outraged at Christians in other countries being treated in a similar fashion.
If you're arguing that a culture is justified by principle in physically assaulting those they feel are a threat to that culture until they cease being a threat, then you'd side with the Christians being persecuted in Muslim countries and in Communist countries, and believe the Nazis were justified in trying to get all the Jews out of Germany by beating them and destroying their net worth until they self-deported (pre-war). I'd bet though that you're like most everybody else, principles take a back seat to whether or not it is YOUR ox being gored.
Christianity won out in ancient Rome (and then around most of the western world) not because they beat their opponents into submission, but because their ideas were better.
If some bunch of Satan worshipers (or more likely in this case a bunch of atheists having fun getting a rise out of Christians) would have much impact and that it is necessary to beat and shun the nonbelievers would pretty much be an admission that Christianity can't stand on it's own without enforcement by physically beating those who would dare to mock it.
Those that argue that since the Muslims use those tactics, that Christians should also do the same thing, are arguing that we should strive to copy those we have the least regard for.
IMO, the problem in America isn't a lack of beatings. It is that a particular religion is being given preference by the decision makers. Companies/schools/etc are all being forced to kowtow to Islam in ways that we would not accept for any other religion.