My reply to muman613 who said:
Even if a building was built today do you really think that the building would stand? I don't think that a vast majority of Jews are prepared to accept the repercussions of having a realy true Holy Temple where the Shechina dwells. I am all for taking steps to rebuild the Temple and look forward to the day when we have it. But I also don't think that by just building a building that the Shechina will dwell in it as she did in the two Holy Temples.
There are many Torah commandments connected to the building of the Temple and the offering of sacrifices, burning the ketoret, lighting the Temple Menora, etc.
Just like any commandment that we do have access to today, I would like it to be done at the highest level, but if it's a choice of a low level fulfillment of the commandment or nothing at all, I will take the low level option, so too, regarding the Temple, sacrifices, Ketoret, Menora, etc.
I would like to have them at the highest quality level but if it is a choice of doing the bare minimum or nothing at all I will choose the bare minimum.
Another point to raise, is that our sages said there were 5 ways that the 2nd Temple was inferior to the 1st Temple. In fact the survivors from the 1st Temple period cried when they saw that the 2nd Temple was rebuilt in a much inferior way and their cries overcame the expressions of Joy of the younger generation, who had only experienced the newer Temple. But nevertheless, our Sages went ahead and built, to fulfill whatever commandments were in their ability and they also knew, that it is easier to jump from an intermediate stage of a mediocre Temple to a high quality Temple, than it is to jump from nothing at all to a high quality Temple.
Also read the book of Ezra. At the start of the 2nd Temple period we see that much of the Nation of Israel were on a low spiritual level. This did not hold back the building project.