just as Moses interceded when they made the calf and God was going to destroy them and he spared them and sent the angels to fulfill his promise and deliver then into the land he have Abraham’s descendants.
so Jesus came after that covenant was broken and became the curse of sin and death and he interceded for all the world that was made guilty by the law
Moses law is seperate from Christianity only an ancient pattern for understanding Christ
I mostly agree with your post.
To "curse" can probably be translated to "burden" or "binding" in most cases and retain its meaning. The "burden" of the OT law was replaced by the "burden" of Christ's law.
The law was never broken, it was fulfilled by Christ. The new covenant
can actually require you to follow the old law if your conscience leads you to esteem it to be necessary, they just don't necessarily apply universally. The laws of Moses were given to the people of Israel
at that time but that doesn't mean that the people of Israel were forever bound to observe that specific body of rules (the pursuit of righteousness is the real law, and each set of restrictions was intended to bring people into a state of righteousness. To be righteous is to fulfil the real law). Paul was a descendent of Israel and by the fulfilment of the law through Christ became free to follow righteousness through Christ without the OT edicts. He did nothing wrong by doing so and was very explicitly not a Gentile.
If someone doesn't have the benefit of knowing based on an established genealogy that they descend from Israel, the chances that each Christian has a physical bloodline is still very high. Everyone has two parents (2^1), four grandparents (2^2), eight greatparents (2^3), etc. If we look back 2000 years and estimate a generation length to be about 20 years, that equals about 2^100 or 1.3E30 (13 with 28 zeros after it) ancestors (note: some of these will be the same person counted multiple times). If there was any level of intermarriage between Jews and Gentiles such as with Timothy's parents, there is a very high chance that anyone with a familyline that has been Christian for a very long time will also be of Israel by physical geneology. If even 1 out of the 130,000,000,000,000,000,000,000,000,000 ancestral positions was Jewish, you too are a physical descendant of Abraham, Israel, and Judah. Certain laws in some countries that might require "10% verifiable Jewish ancestry" aren't really looking to determine who is a physical descendant of Judah, they are merely filtering out those without a recent ancestor that followed the post-crucifixion Rabbinical order. And probably only for the sake of political loyalty.
If we are to say "OT law only applies to Israel" we are still left with the questions of "What do you mean by Israel?" And "Who decides on the definition of Israel if not by the presence of physical ancestry?"
eye for eye... not possible to obey because it is contradictory...
“ forgive others when they transgress against you
An important aspect of "an eye for an eye" in scripture was the concept of equivalence in the OT. The worth of an eye was paid in many cases without physically and literally paying with one's own eye. When there was ambiguity or dispute, the ruling body that got to make the final call on what was an acceptable equivalency was the Levitical order which hasn't been around for 1000's of years at this point. It too just has a modern equivalency in some sects.
The NT gives the message of "Don't take your fellow to court" and "forgive tresspasses" etc. But at the same time also says to freely give your cloak and more when asked by your neighbour. The exchange of materials or resources to cover damages is still a thing, but the bottom line is to not make these claims at the expense of the brotherhood and loving nature between neighbours. One doesn't give up his cloak when requested because a procedural law says so, one gives up his cloak when requested because it is the loving and compassionate (righteous) thing to do. Jesus also doesn't say that an eye for an eye doesn't apply, he makes a distinction between permanent damage (e.g. losing an eye) and superficial damage or indignity (e.g. losing face). Turning the other cheek also plays in with scripture that speaks about being nice to those that curse you so that they may reflect and question their behaviour (And hopefully ultimately change their behaviour). In NT law one may still pursue compensation for an "eye" but within NT law it must only be paid with "good" equivalent and not an evil such as literally taking an eye. There is no contradiction.