Since when? I'm a church-going, Bible studying (and believing) Roman Catholic. There are some parts of the Bible meant to be taken as poetic allegories, and guess what? Genesis is one of those. The only folks we "attack" are those who cling to a faulty interpretation of the Bible regardless of the evidence. In other words, when your beliefs fly in the face of reality, it is time to reexamin those beliefs. Don't worry, though, this will not make you a Satan-worshipping atheist -- though if you become RC, many here will consider it the same thing.
The reality, is that evolutionists after 150 years of saying that evolution is true, cannot give proof for their theory. The reality is that evolutionists use this totally unproven theory to attack the beliefs of Christians. A famous example is the Scopes trial. Another good example is the writings of the virulent atheist, and current banner bearer of evolution Richard Dawkings. While Darwin, dishonestly, never professed himself an atheist, most of those around him were self-professed atheists.
I'm curious as to why you say Genesis is poetic allegory. The reason I ask is because when I think of poetry in the Bible, I think of the Psalms, which has a specific Hebrew poetic sentence structure. (I could get into the details, but that would probably bore too many folks.) For what it's worth, from first to last, the Psalms are mostly praises and prayers.
And the sentence structure of Psalms is nothing like the sentence structure of Genesis. Therefore, and I could be wrong here, Genesis is not considered Hebrew poetry or allegory according to my own studies of the Hebrew sentence structure.
Are Roman Catholic's taught that Genesis is poetic allegory? If so, do you know what they use as source criterion? If not, is this something you've come to believe on your own? Just trying to get inside your head...