before you even think about getting the bais hamikdosh (or anything for that matter) you need to YEARN for it. until then Sadly we will have to wait to even think about rebuilding it. even if its mutar.
the choice is YOURS how much longer we will have to remain in golus R”L
Theres noone to blame but OURSELVES. Mashiach could have came hundreds of years ago already if klal yisroel showed Hashem that we YEARNED for it & called out with teshuva for it to return
May we all wake up ASAP so mashiach can come