Why Christians cannot be in politics?
Simply because they will eventually disciminate against
non-believers when the whole nation is in their control (similarly
for other religions and non-religious too) even if they give great
and nice speechs about how they protect the rights of every
citizens...simply because they believe they are right.
Take Texas for an example, it's stated in their consitution that
no one will be subjected to a religious test to hold any office or
be excluded provided he acknowlege the existence of a Supreme
Being. And this kind of discimination doesn't only exist in Texas
but a handful of American states.
Abortion and relationships that bear no fruits aren't things
that pop out of nowhere with Atheism...they already exist for
decades...
There is evidence to suggest that, historically, pregnancies
were terminated through a number of methods, including the
administration of abortifacient
herbs, the use of sharpened implements, the application of
abdominal pressure, and other techniques.
Those who believe Atheism caused abortion and any other "nasty"
things that they love to associate with Atheism so much are far
from any truth they claim to be speaking and I'm not even
Atheist.