Religion

The chart says "protestants" which obviously excludes Catholics. Which means of course that 20% of the Christian population is excluded. At that point, "evangelical" Christians are going to make up something like 50% of the stated surveyed population. ALL of them are going to hold that point of view. So roughly half of the balance of the rest of the population is going to hold the general positions represented. Now, the questions were a bit broad, so you're going to tend to get fairly rigid responses without alot of nuance to them. For example, I know evangelicals that "believe" the bible is literal, but also acknowledge the rational difficulty in holding that position. What is important to understand is that if for some reason they found out that some critical portion wasn't literally true, it wouldn't really affect their overall faith in Jesus or basic doctrine.

And this is politically important. Their faith in certain concepts isn't nearly as strongly connected to their theological underpinnings, as it is to their world view. Their theology is generated BY their world view. Their objection to abortion and birth control isn't really founded upon scripture or even the long term history of Christian faith. It is a relatively "modern" concept which is founded in the maintenance of cultural norms surrounding sex and social structure. It BECAME a theological foundation after the fact. Look at how people used theology to justify Jim Crow or slavery. Ultimately they walked away from all that, but their underlying beliefs and theology didn't change. Alternately, despite specific scripture discussing the charging of interest on loans, and on the dangers of wealth itself, not to mention throwing the "money changers" out of the temple, they have no problem with ideologies like "prosperity theology".

Anti-abortion views are vastly less based upon theology as they are on some romantic view of babies. People of virtually no particular faith oppose abortion. Those of faith are just more "dedicated" to their views because they have convinced themselves that they are advancing "gods will". If you read the popes letter on abortion, it isn't particularly based upon scripture. And it also discusses things like capital punishment. None the less, vast numbers of people will reference it, ignorant of its total content or its underpinnings.