no, not hard to understand, hard to believe. if you truly believe it, then it makes the state of israel just another country, like iran(which it is). it makes judaism just another religion, like islam(which it is). it makes someone born a jew just another person, like a frenchman(which they are).
what is the significance of circumcision? it is a cutting away of the flesh.
For if ye live after the flesh, ye shall die: but if ye through the Spirit do mortify the deeds of the body, ye shall live.
For we are the circumcision, which worship God in the spirit, and rejoice in Christ Jesus, and have no confidence in the flesh.