Christianity stands against Judaism (James 2:10). Yet, Salvation is from the Jews. Thus, Christians who want to be followers of Jesus must reject Christianity.

Judaism can never change its doctrines through the ages (Luke 16:17), yet, in addition to oppose or purports to change key doctrines in Judaism, Christianity practices or holds to doctrines which are explicitly forbidden by Judaism. Jesus says that salvation is of the Jews. He also says that the Scriptures or the Jewish contains eternal life. He did not say that salvation is from the Christians nor that the New Testament gives life. In fact, there is nothing in the New Testament which stands against the Scriptures. Christians twist the doctrines of the Jewish New Testament one way or another to lead many astray. The New Testament contains the writings of Jews who have not eaten even one unclean food.

Christians must unwind and choose total Judaism to be saved because Salvation is from the Jews and Jesus also says that He did come to loose the Law or the Prophets. Christians must reject Christianity and choose the Faith of Jesus which is Judaism with the new Gospel of repentance and remission of sin.

Hence, if anyone has loosened anything in the Law or the Prophets, or if anyone has adopted such following this person is an antichrist. 

John 4:22 CLV
(22) You are worshiping that of which you are not aware; we are worshiping that of which we are aware, for salvation is of the Jews."

John 5:39-40 CLV
(39) Search the scriptures, for in them you are supposing you have life eonian, and those are they which are testifying concerning Me, (40) and not willing are you to come to Me that you may have life.

2 Peter 3:16 (NIV)
(16) He [Paul] writes the same way in all his letters, speaking in them of these matters. His letters contain some things that are hard to understand, which ignorant and unstable people distort, as they do the other Scriptures, to their own destruction.

2 Peter 3:14-18 ASV
(14) Wherefore, beloved, seeing that ye look for these things, give diligence that ye may be found in peace, without spot and blameless in his sight.  (15)  And account that the longsuffering of our Lord is salvation; even as our beloved brother Paul also, according to the wisdom given to him, wrote unto you;  (16)  as also in all his epistles, speaking in them of these things; wherein are some things hard to be understood, which the ignorant and unsteadfast wrest, as they do also the other scriptures, unto their own destruction.  (17)  Ye therefore, beloved, knowing these things beforehand, beware lest, being carried away with the error of the wicked, ye fall from your own steadfastness.  (18)  But grow in the grace and knowledge of our Lord and Saviour Jesus Christ. To him be the glory both now and for ever. Amen. 

'The faith of men' against the 'faith of Jesus' highlights

Think not that I am come to destroy the Torah, or the prophets: I am not come to destroy, but to fulfil. Matthew 5:17 Cepher

But it is easier for heaven and earth to pass away than for one dot of the Law to become void. Luke 16:17 ESV

The faith of the Pope

The writings of the Pope override the bible doctrines.

Rejects the seventh day sabbath

Practices idolatry in the form of christened figures such as Virgin Mary, the Apostles, and other human beings.

Believes in 2 days and 2 nights Sunday Resurrection

The faith of Charles Taze Russel

The writings of Charles Russel override the bible doctrines.

Jesus is Archangel Michael not YHWH God

Rejects the seventh day sabbath

Believes in 2 days and 2 nights Sunday Resurrection

The faith of Ellen G White

The writings of Ellen G white override the bible doctrines.

Jesus is Archangel Michael not YHWH God

Believes in 2 days and 2 nights Sunday resurrection!

Tithing: You are not able to eat the tithe of your grain within your gates, and of your new wine and your oil, and the firstlings of your herd and of your flock, and any of your vows which you vow, and your freewill offering, and the heave offering of your hand. Deuteronomy 12:17 KJ3

The faith of Joseph Smith

The writings of Joseph Smith override the bible doctrines.

Sunday sabbath: Mormons refrain from recreating or shopping on Sundays in order to keep the Sabbath Day Holy

The faith of Herbert W. Armstrong

Keeps the observance of the feasts of Moses which were fulfilled by Jesus

The faith of Protestantism

Many doctrines contrary to Moses and the Prophets

Believes in 2 days and 2 nights Sunday Resurrection

Rejects the seventh sabbath day and self-proclaims Sunday sabbath as a replacement to Saturday Sabbath

Tithing: You are not able to eat the tithe of your grain within your gates, and of your new wine and your oil, and the firstlings of your herd and of your flock, and any of your vows which you vow, and your freewill offering, and the heave offering of your hand. Deuteronomy 12:17 KJ3

Judaism

For unto you is born this day a Savior, the Mashiach of Yahuah in the city of David. Luke 2:11 Cepher.

[Jesus was not born  "Mashiach OF Yahuah" BUT fully Mashiach Yahuah.]

Luke 5:21-24 Cepher
(21)  And the scribes and the Parashiym began to reason, saying, Who is this which speaks blasphemies? Who can forgive sins, but Elohiym alone?
(22)  But when Yahusha perceived their thoughts, he answering said unto them, What reason ye in your hearts?
(23)  Whether is easier, to say, Your sins be forgiven you; or to say, Rise up and walk?
(24)  But that ye may know that the Son of A’dam has power upon earth to forgive sins, (he said unto the sick of the palsy,) I say unto you, Arise, and take up your couch, and go into your house.

Christianity

Mainly: Sunday instead of Saturday, which is not of the 'Faith of Jesus Christ'.