When I went to read the question actually asked, I can see how people might understand the question differently. Because of the way they divide "religion" into Catholic, Mainline, Evangelical, Jehovah's Witness, Mormon, etc., I got the impression that they considered each of the categories different "religions" since they have some very different belief systems represented. On my first reading of the question, I wondered if they were asking if one had to be an evangelical to receive eternal life. I don't think so, especially since I don't think, historically, Baptists are evangelicals as a whole. (I don't consider myself an evangelical, whatever that term means this week.)
I don't think you can take the results of the poll very seriously.