Basically it's not understanding we walk and live in the Spirit (Christ in us) and not in the physical. All believers relationship with Jesus is spiritual until He returns. He will then (physically) take all of his people (the saved) to the heavenly sanctuary where we will be united with Him physically and spiritually forevermore ... AMEN!
Many Christians misplace the focus from spiritual Israel to the literal Jewish nation, they are also confused on the subject of the temple. Most of the speculation for a rebuilt temple springs from a vague reference in 2 Thessalonians 2 dealing with the Antichrist power: “That day shall not come … [until] that man of sin be revealed, the son of perdition; Who opposeth and exalteth himself above all that is called God, or that is worshipped; so that he as God sitteth in the temple of God, shewing himself that he is God” (vs. 3, 4).
Many say that for the Antichrist to sit in the temple (physical), it (a physical temple) will obviously have to be rebuilt.
Those who support this belief are known as Christian Zionists, (they include such popular writers as Hal Lindsey, Tim LaHaye, and John Hagee. Their published book sales exceed 70 million copies—including the popular Left Behind series). Their beliefs are endorsed by some of the largest theological colleges and institutions.
so go search and read about Christian Zionists for a more in-depth understanding on the matter.
1 Corinthians 3:16
Do you not know that you are God's temple and that God's Spirit dwells in you?
If God's Spirit dwells in you .. you are His temple and His people.
It is a spiritual relationship with Christ until He returns.