It's not our place to judge others, especially as Christians. That would make us bigots. Of course, other people trying to impose their secularist ways on us are similarly (although not recognised as) bigotted. It's not important how a group of people act, or even how one person acts, but what is in their hearts in the end, and then it is really only God's concern. All one can do is teach, and if they don't want it, don't give it. They can't say you didn't warn them, at least.