Then again when Paul is preaching in Athens, he tells the people there, "God that made the world and all things therein, seeing that he is Lord of heaven and earth, dwelleth not in temples made with hands; Neither is he worshipped with men's hands, as though he needed any thing, seeing he giveth to all life,a nd breath, and all things;" {Acts 17:24-25}

I am not understanding why if temples are so important now, that the Apostles after Jesus was resurrected condemmed those who worshipped in temples and said that God does not dwell in temples as we have been taught in the mormon church?

JOEL - I agree with Stephen and Paul that God doesn't need to dwell in a temple and he certainly was not dwelling in the temples of their time. If you read these scriptures in their context you will see that Paul is speaking against the Pagan idol worshipping that was going on in the so-called temples at that time. In verse 29 of that same chapter(17) in Acts Paul says:

"Forasmuch then as we are the offspring of God, we ought not to think that the Godhead is like unto gold, or silver, or stone, graven by art and man's device."

They were making and worshipping idols made of gold and silver and using them to represent the constant presence of God in their temple.
But God doesn't need to dwell in a temple; He is omnipresent and can exist everywhere and cannot be confined to one place as those people in Paul's day believed.

On the other hand God can command temples to be built among those who have the priesthood and who enjoy the spirit of revelation, such as Herod's temple of earlier times. These are in fact the Lord's houses, and when such peoples are true and faithful (which was not the case among the Jews of Jesus' day) the divine spirit rests upon and the person of the Lord can be seen within these holy houses.
For us in these latter days temples have been constructed under command of God and authority of the priesthood to perform important saving ordinances and to help us get closer to God.

I have never been taught that God actually dwells in our temples. I have only been taught that they are places that He might visit from time to time as He deals with His children on earth. What we have been taught is that His spirit is present in our temples, which makes it a special place we can go to help us worship and get closer to Him.
We know Jesus will come to His temple at His second coming (Mal 3:1, Rev. 7:15, Ezek. 37:26-28, Zech. 6:12-15). Someone is going to have to build that temple eventually.