If you're looking at it from a strictly Christian perspective, yes - but first off, I'm not a Christian, so I don't look at it from a strictly Christian perspective, and second, this is set in the Marvel Universe, where numerous different pantheons of gods are shown to have an active part in Earthly affairs - you CAN'T look at it from a strictly Christian perspective in that context; it doesn't make sense, since the MU is obviously not a strictly Christian universe. Anyway, vampires, in one form or another, appear all over the world, including in folkloric traditions that don't include Christianity at all, so putting them in a strictly Christian context makes little sense. Eastern Europe has given rise to the best-known variation of vampire, but it's far from the only one - and even that variety includes numerous details that hark back to pre-Christian traditions (garlic, the wooden stake, and running water are all clearly pre-Christian).