Why do christians think they have the right to force their faith upon an entire nation?

i'm episcopalian.ugh its not only christians who do that and i don't recall them forcing their faith upon america.people always put their beliefs on others.thats just the way humans are and you can vote whatever the way you want to.not everyone voted YES on 8 just because they were christian,there are numerous other reasons.religion doesn't always make sense,so what.