There is nothing in the Torah about the Messiah.
The Messiah is implied, which is why the Samaritans, whi reject the rest of the Old Testament, believe one will come.
Rejecting the identity of Jesus Christ as the Messiah is a violation of the Torah: all five books of the Torah contain Christological prophecies, and furthermore require obedience to God. Jesus Christ is God; to reject Him as the Messiah is to violate all commandments in the Torah requiring us to obey God.
The mental gymnastics non-Christian Jews have to go through in order to deny the Godhood and Messianic identity of Christ are a testament to the fallen nature of humanity in general.
Now, earlier, by the way, you cited Hosea as justification for the Rabinnical practice of not offering animal sacrifices. In saying e Messiah is not in the Torah, you have cintradicted yourself; the doctrine of the Messiah is explicitly stated by the Prophets.
If we say, therefore, that it is not a violation of the Torah for Jews to reject the identity of Jesus Christ as the Messiah, because the Messianic prophecies are more explicitly made by the Prophets, we must also by this same logic say that it is a violation of the Torah for the Jews not to make the required animal sacrifices.
If, on the other hand, we regard Hosea, as a prophet, as having the ability to augment Torah pertaining to sacrifice, we must concurrently also say that the Torah is augmented by, for example, Isaiah.
Thus, the Torah is violated by the Jews who do not perform animal sacrifices according to your logic, but is suspended in effect on this point by Hosea, on the other hand, the Jews violate the Torah by not respecting the deity or Messianic identity of Jesus Christ, both on the basis of the Pentateuch alone, and also on the basis of the augmentation posed by the words of the holy prophets who predicted explicitly the birth of our Redeemer.
Further, you have a misunderstanding about what it means to be a law keeper. The standard is not perfection. Indeed it is built into the law what to do when one falls into sin.
I am well aware of that actually. However, that law has been superceded. Thus, when we fall into sin, and there are many more sins than merely transgressing the 613 or so commandments of the Torah, and also, note that we are born i to sin, and thus sin even if we adhere to the Torah precisely, we must go to our priest for sacramental confession. No need to kill any animals. Baptism, confession, and the Eucharist make us whole.
Unfortunately, these sacraments are not available to non-Christian Jews, so they must depend on God's infinite love and mercy for their salvation.
Are you saying that only the prayers offered by Christians are heard by God? I hope not - that would be a serious error.
No. I am rather saying that only sacraments performed by the Christian Church, the One, Holy Catholic and Apostolic Faith defined in the Nicene Creed (however you wish to define that, ecclesiologically; Orthodox, RC, or the invisible church, branch or local ecclesiologies favoured by Protestants) are efficacious, posess inherent grace, and are salvific
ex opere operanto.
God hears the prayers of Jews, and might grant them accoeding to His loving-kindness, but it is not guaranteed. Keeping the Torah, or rather the corrupt Talmudic, Samaritan or Ethiopic exegesis of it, and circumcision, are not acts which confer grace ex opere operanto; by themselves, they are not the means of grace and do not directly facilitate the salvation of those who offer them.
On the other hand, if a baptized Christian dies in what Roman Catholicism likes to call "a state of grace," their salvation is assured.
Catholicism does not view Rabbinical Judaism as being an entirely corrupt religion.
Perhaps not. And it is not entirely corrupt. Rather, it is about as corrupt as Mormonism. Indeed, it is very similiar to Mormonism: replace Joseph Smith with the Talmudic Rabbis and the Geonim, and replace The Book of Mormon, The Pearl of Great Price and so on, with the Mishnah, the tractates of the Babylonian Talmud and the Jerusalem Talmud, the Sulchan Aruch, the Zohar, and so on, and one should get the idea.
Many Christians might not want to hear this, but contemporary Rabinnical Judaism, like Mormonism, is a close corruption of the Chriatian faith. The old Jewish religion became generally invalid on or about Pentecost in AD 33, and entirely invalid in 70 AD with the destruction of the Temple, which resulted in the loss of what superificially remained of it in terms of its ability to perform the sacraments of the Mosaic law.
Judaism, as it exists now, is not "another path" available uniquely to the tribes of Israel; if it were, the majority of the Apostles including their leaders Ss. Peter and James the Just, would not have devoted their energies to converting the Jews to Christianity. One cannot obtain salvation by being a Jew. Judaism has been entirely superceded by Christianity; all of the covenants made between God, Abraham, Moses and ancient Israel now apply to the Christian Church. Just as the Ten Northern Tribes were effectively cut off in their rebellion, Judah and Benjamin have in turn merged into and been supplanted by the Church which was founded by the holiest and most pious of their sons.
And we must not forget that a huge number of Jews embraced Jesus Christ. Of the persecuted Christians in the Middle East, ld the Coptic Church, the Greek Orthodox Patriarchates of Jerusalem, Antioch and Constantinople, the Syriac Orthodox Church, the Assyrian Church of the East, and the Ethiopian Orthodox Church, a very large number are descended from the ancient Jews, and many have Jewish family names. For example, my bishop has the last name "Kaplan." This is particularly the case in the Syriac and Greek Orthodox Patriarchates of Antioch, however, the Assyrians are largely descended from Mesopotamian and Persian Jews converted by St. Thomas and his successors, and even retain a lectionary that preserves Torah/Haftarah pairings. Likewise, the Nasranis of India are more likely than not descended in large measure from Kochin Jews converted by St. Thomas.
The Eastern Church broadly speaking expanded wherever Aramaic was spoken, which in practice meant, wherever there were substantial populations of Jews, Syrians and Mesopotamians. And it covered most of Asia until the persecutions of Tamerlane. There are by the way very small numbers of crypto Jews in China, and the last surviving Manichaean Temple is now used by Chinese Buddhists, Manichaeanism being another religion to spread wherever Syriac was spoken.
In like manner, the conversion of Ethiopia to Christianity was doubtless facilitated in part by the pre-existing Beta Israel; Ethiopian Orthodoxy is the most Judaic form of Christianity.