For all the anti-supernatual silliness in Bultmann, I am finding that the more I study the New Perspective the more I appreciate him. I'll take the following statement by Bultmann, for example, which NP advocates vehemently deny, over NP soteriology any day.
The basic ideas in [Paul's] polemic against Judaism and Gnosticism are these: the cross is a ‘stumbling block’ and ‘folly’ because in it judgment is pronounced against all human boasting, whether boasting based on the ‘works of the law’ or on human ‘wisdom.’ Only in the cross could God’s grace be revealed, because the original sin of both Jews and heathen is that they do not glorify God but set up their own ‘boast.’ The problem, says Bultmann, is 'human pride.'
--Faith and Understanding (ed. R. W. Funk; trans. L. P. Smith; Philadelphia: Fortress, 1987), 279.
See also this statement.