It isn't persecution...yet.
I know what you mean and some times people take it too far and find insult where none is intended.
Still it is worth keeping a eye on. Cultural contempt can have some very nasty end results.
What religion is professed by the top five elected officials in your state?
How many Christian channels are on your local radio? How many dedicated to other religions?
How many Christian channels are on your local cable system? How many dedicated to other religions?
How many holidays derived from non-Christian religions does your state and/or local government honor? How many Christian holidays?
Using the word 'persecution' in this context is offensive.