then why does Christ need the rod of Iron?? Why are sacrifices for sin being offered in the temple?
Those born into the Millenial Kingdom still have a fallen nature to deal with. The rod of iron will give them an incentive not to act upon their fallen natures.
Why are sacrifices for sin being offered in the temple?
Who said those are sacrifices for sin? From what I understand they are merely memorial sacrifices for the One Sacrifice on Calvary.