I already posted an answer here but, strangely enough, it went poof.
Once again: It doesn't matter what the Jews do. The Temple that fits the bill in Ezekiel will not be built. They may be building something now but it is - and always will be - without God's blessing.
Why? God, through Christ's work, has moved forever past the Levitical priesthood, the same priesthood this passage requires.
We know that all have gone past the need for circumcision. Yet God, in the Ezekiel passage under consideration, not only countenances circumcision, but requires it, calling those who are "uncircumcised in flesh and spirit" an "abomination".
How in God's green Earth can this possibly be future?
It can be future because it falls within a Book dealing with the future.
The reason the thought that salvation in Christ equals the end of Israel and is commonly used as an argument against a Millennial Temple centers, I believe, on imposing something into Levitical Service which was never there, mainly...salvation.
The Tabernacle, nor the Temple, is ever once is suggested as being a means of salvation for men. It did not have that value when prescribed by God, and it will never have that value in the Millennial Kingdom.
Those sacrifices pictured the death of Christ, just as Communion pictures the death of Christ, and we do not suggest a blasphemous quality (and not saying anyone did that in this thread, just that is the usual argument against a Millennial Temple) to Communion because we memorialize His death with it.
And in Communion we see something sometimes we forget about...
1 Corinthians 11:24-29
King James Version (KJV)
24 And when he had given thanks, he brake it, and said, Take, eat: this is my body, which is broken for you: this do in remembrance of me.
25 After the same manner also he took the cup, when he had supped, saying, this cup is the new testament in my blood: this do ye, as oft as ye drink it, in remembrance of me.
26 For as often as ye eat this bread, and drink this cup, ye do shew the Lord's death till he come.
27 Wherefore whosoever shall eat this bread, and drink this cup of the Lord, unworthily, shall be guilty of the body and blood of the Lord.
28 But let a man examine himself, and so let him eat of that bread, and drink of that cup.
29 For he that eateth and drinketh unworthily, eateth and drinketh damnation to himself, not discerning the Lord's body.
While it is a memorial those observing it sit under warning. Association with Christ's death in an unworthy manner suggest sin and judgment for that sin.
Now, we know that for the born again believer sin, on an eternal basis...has been atoned for, but, that does not mean that believers do not sin and are called to repent and be cleansed.
In the Millennial Kingdom it will be no different. Believers will sin, and there will be atonement made for that sin. Not on an eternal level, but temporal, just as is the case under Old Testament Economies.
So I see nothing at wrong with the Sacrifice of Christ being memorialized through animal sacrifice (though I am not saying that this will be to the extent it was under Law) after the fact just as it was merely picturing Christ's death before the fact.
Couple that with the fact that we forced, if we reject the Prophecy of Ezekiel's Temple, to also reject the rest of the Prophecy.
Prophecy has never been given with an option for choosing which parts we will embrace and which parts we will not. Prophecy has always been fulfilled to the jot and tittle, never in part, and never having parts become obsolete or made void by new revelation.
The (Covenant of) Law was made obsolete, but the Law was a reality in Israel and served it's intended purpose. So I see no reason not take God's Word at God's Word, and understand that this Prophecy will, like all Prophecy is, fulfilled at some point. And since we cannot see a fulfillment as having occurred as of yet, it is best to view this as Prophecy that will one day be fulfilled.
God bless.