To claim Christianity is Judaic in any way is to not know either Christianity, or Judaism. Or both.

In Christianity it's very clear that the Old Testament is the Hebrew Bible and it's only there, useful for Christians as a set-up for the New Testament. The New Testament basically retconns/rewires Judaism into something that barely resembles it in fact it's not Judaism at all. Basically, in the New Testament, Jesus comes and therefore fulfills the prophecies of the Old Testament, he fulfills the old covenant that was just for the jews and proclaims a new, Christian order based on him being Son of God (but also, God), sinless, his death being a sacrifice that precisely fulfilled everything and salvaged humanity, and a reminder of humanity's (jews') sinful nature, and resurrected, proving his godhood, and his ability to grant salvation by following/worshipping him.