"to every person who has become a Jew." Paul is using circumcision as a mmetonym for being Jewish. (See: [[rc://en/ta/man/translate/figs-metonymy]])
## obliged ##
"bound" or "constrained" or "enslaved"
## to do ##
"to obey"
## You are alienated from Christ ##
"You have ended your relationship with Christ"
## seek to be justified by the law ##
"look for ways to have God declare you good by obeying the law." The law is metonymy for Judaism.
## you have fallen away from grace ##
Paul is comparing a person who decides that he does not need or want the grace of Christ to someone who falls from a good high place to a bad lower place. (See: [[rc://en/ta/man/translate/figs-metaphor]])