The messiah theme is much stronger in the manga. Not just the resurrection: she collects followers, at least one a converted enemy, by showing an all-encompassing love and helping those in need wherever she can.
On at least one occasion someone explicitly addresses her as "you, who would be a messiah". And no, that's not a translation artifact; the word is 救世主.
Of course, it is also subverted in some ways, most explicitly in the end, where Nausicaä destroys a plan for a new, better world, in favor of an escape from prophecies and grand plans.
I thought this was intentional, cause she sacrifices herself then gets resurrected, also visuals like https://www.mother-god.com/images/nausicaa.jpg and https://beneaththetangles.com/wp-content/uploads/2015/04/507...
But she's definitely not the same throughout the movie, cause she kills 3 guys early on.
I never thought of the parallel with Christ in the numerous times I watched this film but I can understand why someone would make that connection given the final scenes.