This might be what the church teaches, but Jesus himself? This is what he has to say:
(Matthew 5) 18"For truly I say to you, until heaven and earth pass away, not the smallest letter or stroke shall pass from the Law until all is accomplished.
19"Whoever then annuls one of the least of these commandments, and teaches others to do the same, shall be called least in the kingdom of heaven; but whoever keeps and teaches them, he shall be called great in the kingdom of heaven.
(Luke 16) 17But it is easier for heaven and earth to pass away than for one stroke of a letter of the Law to fail.
(Matthew 5)17"Do not think that I came to abolish the Law or the Prophets; I did not come to abolish but to fulfill.
And of course Paul and John...
(Romans 3)31Do we then nullify the Law through faith? May it never be! On the contrary, we establish the Law.
(2 John) 6And this is love, that we walk according to His commandments This is the commandment, just as you have heard from the beginning, that you should walk in it.
So basically people need to keep the OT law down to the smallest letter ("tittle" in the King James). So how do Christians justify all the "unjust" or "unnecessary" laws of the OT like not having contact with a woman when she is on her period? Planting 2 different crops in the same field? Women wearing garments of 2 different kinds of fabric? What about all those laws that talk about killing unbelievers on sight, etc?
Personally, I don't understand why most Christians can't accept the idea that some points of the Bible are religious and some are cultural?