Who would have reason to lie about the holocaust and why. If the holocaust happened as is generally believed, why would there be those who would deny it. Let's list the reasons.
1. To make money. There are people who write books or give lectures to make money by supporting all sorts of conspiracy theories. I imagine holocaust denial would fit right in.
2. To cover the guilt of having killed so many "innocent" people. Which is no reason to me. There are people out there who would say that even if 6 million Jews were killed, it wasn't nearly enough.
3. To help sell the idea of White patriotism not being so bad by saying White patriots didn't kill as many Jews as is generally believed.
4. Those who don't like the Jews would likely be interested in slandering them by saying that the Jews mostly made up the whole holocaust thing.
Now let's say that the holocaust was largely a fabrication. Why would people lie by saying that 6 million Jews were killed. Let's list those reasons.
1. For the victors to demonize their enemies is a tactic that is probably as old as mankind. A holocaust story would help do that.
2. In 1933, a London newspaper headline read, "Judea declares war on Germany." And in war it is said that truth is the first casuality. The Jews controlled the movie industry. They may have also had a major influence in the raido industry. This gave them a huge "soapbox" from which to spread their lies.
3. Jews probably sought revenge against the Germans for having dared to deport or force out the "chosen of GOD!"
4. Reparations were made by Germany for the whole holocaust thing. As far as I know, they're still being made. If the holocaust was shown to largely have been a fraud, those reparations would dry up. Jews may even have to pay most of them back.
5. The U.S. might lessen its funding of Israel. A country that it already gave nuclear weapons to.
6. By playing the "pity" card, Jews can get away with far more.
7. For many Christians, a good way to prove the power of their imaginary god is to support the Jewish people.
8. If the holocaust was ever disproved, Jews might again be persecuted.
9. National Socialism was economically sucessful. Capitalism wasn't and still isn't. To support "The American Way," it would be very helpful to discredit National Socialism in any way possible.
10. Stalin was the real monster. The holocaust and other things could be supported so the U.S. doesn't look so bad for having supported Stalin.
11. If the holocaust was shown to largely be a fraud, most people would feel extrmemly suckered. They would lose even more faith in the U.S. government.
12. German National Socialism wasn't into the whole multiethnic society thing that is constantly being shoved down Americans throats. So to support their multiethnic society, they have to discredit the White patriot national socialist party. Etc.
Keep in mind that history is written by the victors. Consider the power the U.S. government and the jews have to see that their version of history prevails. Compare to that to the power of the few who seek the truth for the truth's sake. Holocaust deniers vs holocaust promoters. Holocaust promoters have much more reason to lie.