The Temple curtain was ripped in two at Jesus death, hence the Most Holy was no longer separeted. He had other sheep (gentiles) that would become part of one flock (all of spiritual Israel).
The Kingdom of God can be "in" you right now. Heaven or Hell is of your choosing, this very moment. The imparting of the Holy Spirit is the seal and down-payment of the reality that has yet to be revealed. Heaven is to be wirth Christ, seeing him face to face, rather than a physical location. These are the general precepts of the Christian faith as it is currently understood.
I guess I would have to ask you - do you love Christ and want to be with him (regardless of all the philosophical meanderings of the intellectual mind)? If the answer is "no" then how on earth do you think you can call yourself a Christian??