Pictures of dead babies aren't going to win over many hearts and minds. Speaking to people in a language they already understand about what matters to them most will get us a lot further.
For example, there are plenty of extremely conservative Christians who regard much of the religious right as heretics. I see their stuff sometimes when I'm researching right-wing groups online.
One site I run into a lot is
http://www.seekgod.ca/index.htm which states "This website is an independent Christian research and apologetics ministry focusing on Christian Articles to Encourage, and Research Articles to Warn about the Global Ecumenical Movement, (One World Religion) involving groups from the Occult and New Age, to Evangelicals, Catholics, Pentecostals, Jews, Charismatics, Hebrew Roots and others. ... The apostasy of specific leadership or organizations is exposed. This site is specifically for Believers in Jesus Christ and those seeking answers to today's problems."
There are also liberal Christians online, like the excellent blogger at
http://slacktivist.typepad.com who sees end-times theology as heretical (because it presumes to know the will of God -- or even to manipulate God magically through manipulating worldly events) and has the arguments to prove it.
We might also point out to Christians that the separation of church and state wasn't originally a secular idea. It was invented by Roger Williams, founder of the Baptist Church, because he felt that absolute freedom of conscience lay at the heart of religion and could only be corrupted by association with worldly ends.
Fundamentalism is a simple faith for people who are baffled by the ambiguities of the modern world and seek easy answers. But if they are genuine Christians, it ought to be possible to point out to them that their own religion is far more complex and more demanding than the version offered by the tv evangelicals.
And it also wouldn't hurt to suggest that Christianity was essentially hijacked by the hard right back in the 1980's because they knew that was the only way to get into power and enforce their essentially secular agenda of domination and control.