The bible contains some rediculous rules:
1. You can't be gay
2. You can't have long hair
3. A woman must serve her husband (i.e a woman is inferior to a man)
4. A woman can't lead
5. Loads more
It's a religion based on fear. Disobey it and you go to hell. It also created creationism, the theory of Noah's ark, both of which have been disproven time and time again yet there's so many idiots following it that they cling to their rediculous beliefs. And it fails to mention that homosexuality is genetic and not a choice.
Don't get me wrong, most Christians are good people but the religion is deeply flawed.
Good Christian: 1. Thou shalt not swear 2. Thou shall not kill 3. Respect and love your neighbour
Redneck: (struggles not to shout out he is just a violent ignorant person who needs to vent out his natural anger at everything) Err...Ermmm...Fuck u ur goin ta hayelll!!!
There are many different denominations of Christianity, and it is incredibly hard to estimate how many Christians there are in the United States because there is no common belief on what defines a Christian. The most liberal view of everyone who says they are a Christian being a Christian would place the figure around 75%, whereas the considerably more conservative belief that anyone outside your own denomination is not a Christian can place the figure as low as 0.1%.
Denominations sprout from the original idea of Christianity because some phrases from the bible contridict each other, and thus to harmonise this people say phrase A is literal whereas phrase B is symbolic. However, one group might say A is symbolic, but another might say B is symbolic. Thus, there are now hundreds of different denominations preaching slightly different versions of effectively the same source material.
Unfortunately, as Christianity is the 'big' religion of the Western World, it gets a lot of negative press. However, like all groups, Christianity has the best and worst among their number. The Christians who get the most press are the ones who give the stereotypical image of never doing anything wrong, and sitting on streets shout 'REPENT OR GO TO HELL', or something similarly pleasant.
However, many Christians - most, in fact - are decent people who just want the right to practice their own religion, like everyone else (or the right to NOT practice a religion, in the case of some).