Au contraire, Christ's teachings show that Jews don't get it.
Blood was needed to purify the altar of the temple. That ain't A-1 sauce. That's blood. And, they didn't do "donations" to get it. They did "sacrifices."
Blood from the sacrifice on the Cross by the Lord purifies from all impurities. Not just individual sins, but sin in the collective.
Um... no. You evidently know nothing about Judaism, or Tanakh (what you call the "old testement"). Show me a single source about blood "purifying" the Altar.
"Blood was needed to purify the altar of the temple."
Actually, it was to purify the kohanim.
(I should know; I am technically a kohen (genetically proven, even), albeit one in a state of considerable impuirty, as I married a gentile.)
Backing up (and not thinking about NOW, instead of then as I did in my last post), I suppose the Red Heffer would legally be needed to un-do what Titus did to the Temple Mount, assuming continued application of the Law of Moses.
Above my pay grade to opine, though.