Replying to Westboro baptist church

look i hate these people and i think everything they say is bullshit and fucking horrible, but i dont get how someone religious can argue with them. they seem to just follow the bible word for word and its easy to disagree with them from an atheist standpoint (why fucking follow a book written thousands of years ago) but can someone religious post a reasonable argument for why their interpretation of the bible should be followed rather than the westboro baptists?