Not exactly, tush. It's possible, but we just don't know. Baldur does match the profile of a so-called Dying God, affiliated as he is with the sun, and plenty of gods fit that profile; Jesus is but one example. (Of course how closely he resembles those figures and whether that matters are different thoughts entirely.)
On the "it could be true" side, there is a very different version of Baldur's death in Anglo-Saxon mythology. The Anglo-Saxon myths lack Loki, and that's part of it, no doubt, but it's also completely devoid of the martyrdom aspect of the Edda version. And it is suspect that Ragnarok is apocalyptic when systems similar to the Norse ones tend to be cyclic (Persephone, Dionysos etc. come back again every spring, the death and rebirth of Osiris is ritually re-enacted as the year goes on, etc. etc.). Snorri was definitely a Christian re-telling indigenous stories and one must certainly read the Eddas with that in mind.