Which covenant is that ?
All seven covenants in the Bible deal with Israel, not infants
Original sin is a reality from which each and every human person desperately needs to be freed. Biblically speaking, Romans 5:12 is remarkably clear on this point:
Infant baptism frees a human from original sin?
I guess the writers of the NT forgot to make that point in all their writing. The blood of Christ actually does that. Just a suggestion but reading Romans Chapter 5 in context might clarify your misunderstanding of Romans 5:12 which has nothing to do with infant baptism.
I really want to weigh in on this baptism issue, but I have a bad feeling that I’d derail the thread if I did, and a little worried that I’d get lumped in with believing the same thing as Roman Catholics, even though I very much don’t.