Holocaust denial is only a crime because the defenders of the orthodoxy are so terrified of an honest and open examination of the issue.
Throughout history, all hoaxes were perpetrated int the context of their own times; what the hoaxer could get away with. When Ramses The Great lied to his people about the battle of Kadesh he did so because in his time, few if any Egyptians had the means to travel to Kadesh (which actually remained under Hittite control) and find out for themselves what happened, and those few Egyptians who did know the truth had no means to get the word out to their fellow Egyptians, who were being brainwashed by the carvings on the temple walls.
But today, because of the ease of travel, and the internet, it is common knowledge that Ramses was male-cow-manuring his own people.
Over the years, many of the claims made regarding the horrors of the Nazi slave labor camps have come under re-examination as new technology becomes available.
As one example, there were claims that the Nazis were making soap out of the dead bodies of their Jewish victims. When the story first surfaced in 1943 as part of a fund raising tour by Russian Jews seeking aid to rebuild Russia, there was no way to verify it. As new science and technology came along, surviving bars of soap were tested and found that far from being made from the fat of human victims, the soap was a typical wartime soap made with very little fat at all. Later DNA tests showed the fat was not from humans, but from pigs (a serious embarrassment to those who had buried bars of the soap in Jewish graveyards).
Then there was the story about the human skin lampshades. This story went that the wife of a camp commandant obtained the skin from the camp's victims and used it as a crafts material for lampshades, gloves, and so forth. Again, at the time there was no way to verify the story. But as science developed new methods, the lampshades and gloves were found to be made of goatskin, a common craft material of the time.
The there were the claims of mass graves at Treblinka. Over 800,000 victims of the Nazis were claimed to have been buried there. But one of the grave sites abuts a water well, and when testing of the water failed to detect any of the contamination which would result from burying thousands of bodies near a water well (the water should have been lethal to drink), the story was revised to claim that as war's end, the Nazis had dug all those 800,000 bodies up and cremated them to conceal the evidence of their crimes. Again, as science progressed this story came into doubt as there was no trace of the vast amount of combustion residues which would have permeated the site of such a huge fire. And finally, ground penetrating radar, which certainly did not exist back when this story was first told, proves that the area where the graves are supposed to have existed has never been disturbed. The strata remains as it was laid down by the glaciers during the last great ice age.
Time makes ancient truth uncouth, and as new science comes along it is the normal practice to apply that science to the world to refine, and in some cases revise, what we know of our history. New technologies are being applied to the wreck of the Titanic, to determine what role the quality of metal played in the disaster, as one example. Seeking to know more about what we know is a natural instinct for humans.
Except, of course, in this one area of history. And it is the sheer weight of political force brought to bear to silence those who ask questions which most advertises that there is something being hidden from us all.
There is nothing that is beyond re-examination using new technologies. There is nothing above question. That we only just now learn that Tutankhamen had an impacted wisdom tooth does not bring about the end of Egypt. It's just scholarship. Even the much venerated Shroud of Turin has been subject to re-examination by science. The results were not as hoped for, but for those who hold truth to be the most valuable commodity we have, the outcome was still positive; we know more today than we knew yesterday.
Frankly, as we watch the political bludgeoning of Bishop Williamson by the defenders of the orthodox account of WW2 it becomes obvious that they are afraid, intensely afraid, which means they KNOW they defend a story which, like Ramses tale of victory over the Hittites, will not survive objective re-examination. Every act, whether it is the jailings of Zundel and Rudolph, the wrecking of academic careers, and now the imposition of Jewish religious will over the Vatican; each and every action is an advertisement that here is a question that cannot be allowed to be asked.
We do not arrest people who think Elvis is still alive. We do not send people who claim to have seen Bigfoot to jail. We do not wreck the careers and finances of those who claim they had sex with little green critters on board a UFO. Only on this one topic is refusal to conform to the 'revealed wisdom' so fraught with peril!
Look at where all the cover-ups overlap. Look for that most protected point. Look for that focus where even bitter enemies come together to conceal, and there you will find lurking the greatest lie of modern times; as great a lie as when the Pharaoh of Egypt claimed to have won a war against the Hittites.
Let the truth be told, though the heavens may fall.