RebDoniel: 1) sefiros do not relate to chassidim in particular, but rather are a core feature of all kabbalah for at least the last 500 years, 2) pulling someone out of gehinom by his peyos was not meant literally (and anyway it is consistent with the statement in the Zohar that tzaddikim are more powerful after death than before), 3) I personally use money, but I don’t see why kapparos with a chicken (which by the way is not limited to chassidim) is any more Xian than the original Torah version of pushing the “scapegoat” off a cliff, 4) the Gemara itself says the death of tzaddikim atone for the sins of the generation (maybe Shabbos 133), so this is not far-fetched, 5) this is a very recent belief, so can’t be used to judge all chassidus, 6) many ancient rabbinic commentaries also associate Yeshaya 53 with moshiach — Xians aren’t the only ones, but that doesn’t prove they’re right.
Aside from the meshichists I don’t see any significant similarities with Xianity in what you wrote. Even in the case of meshichists the similarity is coincidental — they don’t believe the Rebbe died for their sins to atone for humanity’s sin and enable us to be saved, as Xians believe about their alleged savior.