More than anything, Wallis strikes me as a left-wing eccentric -- a sixties hippie who took his spirituality too seriously. I don't know whether being pro-life qualifies as eccentric or apostate on the left, though.
Philosophically, wouldn't he belong in the garden variety European school of Christian Socialism? The socialism, pacifism and anti-Americanism are all of a piece with this.
I don't know for sure - because over in Europe (Britain included) there had never been a major tenant of Christianity-derived belief that combines pacifism and moral conservatism. They were supportive of "just wars" as waged from their national perspectives in the pre-WWII times, while it is true that their successors after the war became pacifist, they have also altogether become lax regarding morals like gay rights as well.
There is a major belief among "pro-life, pro-moral pacifist Christians" that Bush is the Antichrist - of course they must ignore passages in the Bible saying everyone will like and worship the eventual world dictator except Christians. When you know many self-declared atheists hate him, well, Bush fails this criteria.
BTW, I would be interested to know what his response to the full blown socially liberal atheists like Ted Turner would be like. Will Wallis declare to Turnr that God is real, and not "just for the weak" as Turner had famously remarked? What will Turner or people like the NYT journalists regard someone who agrees with them on most issues, but believe in God, and speaks out against abortions, porn, euthansia, and gay rights?
And speaking about Euroepan liberalism, there are two threads on British leftism that has attracted quite an America-bashing response from a self-delcared British Conservative here (who is a newbie on FR). Have a look at them and let me know what you think (his screen name is cooper72):
http://www.freerepublic.com/focus/f-news/1378279/posts
http://www.freerepublic.com/focus/f-news/1378395/posts