So then the Muslims and Christians rely on our tradition so how can you say they are wrong?
Lavikor, I am spending a lot of time typing these answers, so you better not skim through them all.
It is quite obvious. But first, I hope insult no one by writing this because we do not wish for you to convert to Judaism but instead follow the seven laws. But first the Christians and Muslims can claim only half of our tradition which proves them false. They both do not recongnize the Oral Torah, and the written Torah is nothing without the Oral Torah to go along with it. The Christians belief that there is no Oral Torah makes it so they cannot follow the written one. The written Torah makes no sense, and may convey the compeltly opposite message it intends to, when someone reads it without the Oral law. That is the reason they are false.
The Nazarene's followers clearly state
that all the sages of the jews opposed them. Not even a single sage supported them. Even among the Jewish lower class did the majority not support the Nazarene's. The Nazarene's claim to prophecy is based on his own words; but none of the sages or their great assemblies which were at a very high state supported him. The writings of the Nazarene state that the sages rebuked him and his followers for violating the law of the Torah. The writing claim he is of the seed of David, but at the same time that he has no father. Even the most ignorant of our people know that the lineage which is not through the father is never considered in Biblical genealogy. In addition, he claimed that he did not intend to change the law of Moses, yet he himself abrogated some laws and his followers abrogated all of them. In addition he claims to be the Messiah whose function as foretold by the Bible is to redeem Israel; but we saw the opposite of this redemption after his death; for the Messiah is clearly foretold by the prophets to appear and rule Israel in person. In additions the scriptures foretell (Isaiah 45, Zefania 3) that all the nations shall be united in true faith at the advent of the Messiah; but after the Nazarene nothing of that kind transpired. On the contrary Islam developed and spread over many nations and Christianity broke up into many sects which continue to slaughter eachother in such places as Northern Ireland.
The contradictions that the "New Testament" has with the Torah are numerous. I will not name them all because to tell you the truth, I do not wish to attack Christian scripture if they follow the seven laws.
The Mohammadans and Nazranes have upheld the truth of our prophetic books for 1300 years and they admit that they were true if not still today. Yet both admit that our sages opposed them. By this admission they prove their error. How so? Because the Torah says in Devarim 17:
"When a matter of judgement is concealed from you, you shall go up to the place which G-d shall choose and you shall come to the Coheniem and Levites and to the judges who shall be in those days; and you shall inquire and they shall tell you. And you shall do according to the word that they tell you; and you shall not turn aside from the word which they tell you; to the right or to the left." If the followers of Mohamad and the Christians admit that all our sages opposed them, then they therefore admit the Jews are right in obeying the sages because G-d influences the sages.
Now of course these judges were not around in Mohamads time, so therefore, how can we say Mohamad was wrong? Well the Quran calls Jesus a prophet, which therefore, makes them oppose the descion of the sages that rejected Jesus and therefore they go against the Torah's command as well.
But either way, the spread of Christianity and Islam are great things among the gentiles because they follow our G-d! Therefore, I encourage all Muslims to continue to practice there faith and Christians to follow the seven laws! I also beg all Hindu's and Buddhists to convert to one of these religions Islam being the much more monotheistic one, so they should try Islam, if they can even better just follow the seven laws and become righteous gentiles/noahides.
The Jews accpted the Torah though because they heard the voice of G-d tell them to. Not because a few miracles Moses performed. Miracles can be performed by evil as well to trick us.
Non-Jews are not expected to follow Torah because it is only logical that the people who should follow it are people who G-d proved to it is real, and there descendants. Unlike man made religions the Torah was not preached by individuals who afterward suceeded in persuading or coercing the multidutes, but instead from the first day our Torah was accepted by millions.
Our Torah says that it is eternal and that any one who claims to write a new book or claims that we should no longer follow Torah then they are obviously false.
If a religion claims the Torah is theres, but that the Oral Torah is not, then they are obviously because what they follow is an incomplete work that may convey the exact opposite of its message without its counterpart.