Or, to put it another way, did God break the covenant of circumcision? The Jews certainly didn't.
Good thinking! I like to see that. There are other everlasting things, that do not pertain to us. (Let's get to the rainbow later; it's kinda hard to say there's anyone it doesn't pertain to

)
1. The term "replacement theology" is seen by it's endorsers as a villainizing distortion, creating anti-semitism where there is none. I say Scripture makes it clear that God has NOT cast off His chosen people Israel, and so no aspect of Christianity invalidates any everlasting Covenant. This much is plain to me, others don't see it. A search through the Scriptures is pretty conclusive.
2. Jews have Covenants unique to them. I'm not a Jew. I'm not a born Jew, nor have I voluntarily joined myself to the Lord via conversion to Judaism. While it is possible and a couple of people on CF have done it or are going through the process, Jews themselves
discourage conversion to Judaism. This speaks volumes to me!
3. Christianity is a New Covenant, made in Christ's shed blood. Circumcision is in the heart, and the rest of the Covenant is likewise
patterned after everything we see in the Old. The Jews have the figure, we have the reality. They have the physical, we have the Spiritual reality even w/o the encumbrance of physical ritual.
Both speak to the same Truths!
This is why we keep the old
testament, even though we are not under and do not keep to the Old Covenant. Every detail of the OC, has it's fulfillment
in Christ. This is an advanced concept, not to be taken lightly! Some of this we may be able to "see" or understand via our own learning and that certainly helps, but what really matters is for G-d to make these things living reality within us. And that is when this ceases to be mere talk or theology, and becomes relevant to daily life. (And allow me to point out, that this journey is depicted as the journey Israel made, going from Egypt to Canaan.)