Davo, Why do you think that the temple was destroyed and cast down to the ground? It was not because the people weren’t following the Jewish law. On the contrary, it was because they WERE following the Jewish law which was NOT the Law(word, covenant) established by God. They threw the word of God away and trampled on it, setting up their own kingdom, according to their own laws. All the prophets say this.
Isaiah 28:13-15 “But the word of the Lord was to them precept upon precept, precept upon precept, line upon line, line upon line, here a little there a little, that they might go and fall backward, and be broken and snared and caught. Therefore hear the word of the Lord, you scornful men who rule Jerusalem, because you have said,” We have made a covenant with death, and with Sheol we are in agreement."
Jesus tells us this. Mark 7:7 'Their worship is a farce, for they teach man-made ideas as commands from God."
Colossians 2:22 tells us this. “These will all perish with use because they are based on human commands and teachings.”
1 Timothy 4:1 says “Now the Spirit speaks expressly, that in latter times some will depart from the faith giving heed to deceitful spirits and doctrines of demons.”
Galatians 4:21-31 tells us about the two covenants. Verse 24 “for these are the two covenants: the one from Mount Sinai which gives birth to bondage, which is Hagar- for this Hagar is Mount Sinai in Arabia, and corresponds to the Jerusalem which now is, and is in bondage with her children.” The covenant which Israel was under at the time was not established by the Spirit but was man-made( born according to the flesh vs.23) It did not come from Mt. Horeb( the mountain of God) but from a foreign location ( Mount Sinai in Arabia) meaning it was pagan in origin.
There is and always has been only ONE covenant established by God, and it is everlasting.