Zechariah 14:17 And it shall be,
that whoso will not come up of
all the families of the earth unto Jerusalem to worship the King, the LORD of hosts, even upon them shall be no rain.
18And if the family of Egypt go not up, and come not, that
have no
rain; there shall be the plague, wherewith the LORD will smite the heathen that come not up to keep the feast of tabernacles.
19This shall be the punishment of Egypt, and the punishment of all nations that come not up to keep the feast of tabernacles.
This is talking about after Jesus returns. All the places there you see "nations", it's that word goy or goyim - Hebrew for that word gentile.
So we see that gentiles will be punished for not keeping God's law after Jesus returns.
Romans 8:
7Because the carnal mind
is enmity against God: for it is not subject to the law of God, neither indeed can be.
8So then they that are in the flesh cannot please God.
Paul says the mind that doesn't submit to God's law is carnal at against God.
Matthew 23:2Saying, The scribes and the Pharisees sit in Moses' seat:
3All therefore whatsoever they bid you observe,
that observe and do; but do not ye after their works: for they say, and do not.
4For they bind heavy burdens and grievous to be borne, and lay
them on men's shoulders; but they
themselves will not move them with one of their fingers.
Jesus said to listen to the Pharisees because they taught what Moses taught, the law of God, but not to do as they did - because they put more importance on their own will, traditions and desires than on the law of God.
Even Jesus Himself said "depart from me ye who work iniquity". That word "iniquity", is translated from the Greek word "anomia" which means lawlessness. I mean these are just a few examples. Not only that, but there's several times where the apostles kept the law, and even an instance I can remember off hand of where Jesus (since He's our high priest, and according to the laws they can't enter the tabernacle while having drank alcohol) said that He won't drink wine until He returns. Because He won't be in the tabernacle, and will be free to. My point is, even He at this moment is keeping the law. The while reason He died was based in the law, the whole reason He resurrected was based in the law, so are His entire doings as we speak.
He said not until heaven and earth pass away, and there's verses that talk about how if heaven ever passes away then Israel will cease to be a nation forever. Meaning heaven will not pass away. He was saying it will never pass, not that it will.