Modern Puritans

Puritans were a group of people that had very strict religious beliefs and someone could be killed for not following it.  Puritans do not exist today but there are still groups like them in existence.  In my opinion some people who believe in Christianity act like modern day puritans.  I say this referring to people who think gay marriage should be against the law.  The only argument to support this is god said it was bad.  I feel this shows blind following of religion even when nothing bad actually comes from it, like what the puritans did when people practiced witchcraft.  I thought in today's society there was suppose to be a separation of church and state, but apparently that is not true.