Okay, so now that we've got that out of the way... noting there is no unique distinction between religious-based bullshit arguments and non-religious bullshit arguments... what's to prevent anyone legislating to prohibit religious-based bullshit from extending to non-religious bullshit when the exact same justification for prohibiting one can be used to prohibit the other?
Your connection between freedom from religion and freedom from non-religious bull shit isn't going to work. If it were, the freedom to exercise one's own religion would apply to freedom to exercise one's non-religious bull shit. Is society obligated to accommodate some nut who wants to exercise their bullshit justification for why they ought to disrupt a company's production so they can have sex at 1:30pm? No. We privilege a Muslim's untestable reason to pray 5 times a day with accommodation at work, but we don't for the 1:30 ers.