Despite the fact that the Torah explicitly states innumerable times that the 613 mitzvos absolutely MUST be followed by every single Jew, the Reform Judaism movement exists, and its adherents make up the vast majority of Torah-knowing Jews. For the sake of this article, secular Juduaism, in which the Torah is seen in no way as divine, will be considered as completely different from Reform Judaism. Secular Jews are only at fault for not trying to learn about the Torah's divinity, but Reform Jews actively know the Torah and intentionally avoid observing its mitzvos and go against every single reputable Torah authority. Screw those idiots who rigorously study the Torah, Torah sages, and Oral Torah, which we must deny to avoid the reality that the Torah obligates all (yes, including those who say "I'm not orthodox!") Jews to observe the mitzvos. Before I begin the actual debunk, I ask you, can you find even one reference to Reform Judaism being legitimate in the Torah, Torah sages, or Oral Torah? To save your time I'll tell you the answer: you cannot. When you realise that you cannot, notice that you fell for a hoax. That's okay. I've fallen for MANY hoaxes myself.
The Torah says many, many times that all Jews must observe all the mitzvos [that are applicable], and lists many, many negative consequences of failing to observe them. The Torah makes not even one mention of the special group of "reform" Jews. Saying "I'm not orthodox" is meaningless.
Reform Jews often doubt the veracity of the laws, claiming that they were invented by humans. This is sometimes even combined with a conspiracy theory that rabbis make rabbinical laws merely to obtain money. The Torah actually has a story of the original reform Jews, that being the story of Korach. He and his group doubted that the laws came from G-d, and met destruction. This story serves as a cautionary tale for pseudo-Torah groups that deny the veracity of the laws, such as the reform movement. As a side-note, even the rabbinical laws must be followed by all Jews, as the Torah says in Devarim (Deuteronomy) 17:11, "According to the law they instruct you and according to the judgment they say to you, you shall do; you shall not divert from the word they tell you, either right or left."
Another argument that some reform Jews make is that the laws are outdated, for example the dietary laws. The dietary laws are often erroneously claimed to be health-related laws. If so, they would indeed be outdated. However, they are not about physical health, but "spiritual health." They are designed to give spiritual pleasure and to give us a better relationship with G-d. Another example is the modesty laws. People dismiss the modesty laws as being outdated because "society has changed" or similar reasons, even though the Jews are supposed to be a "light to the nations", and to be distinct from the gentiles. The main reason the Jews in Egypt deserved to be redeemed was that they dressed differently and had a completely separate culture from the Egyptian gentiles. Some say that the modesty laws are "sexist" even though they don't imply any inferiority of women, and to some degree empower them by making them not sex objects.