Perhaps in the case of GERMANY, they're fully aware how a LIE becomes THE BIG LIE because they went though the NAZI experience and don't want to relive it.
The same could be said for many Jewish people and the authenticity of the Holocaust could it not?
A small lie can become a big lie, we have ascertained this, yes?
As almost all evidence supporting Gas Chambers and the numbers killed in such a manner relies almost entirely on witness testimony alone, then we also have to ascertain that all witness testimony is above reproach and can where possible, be proven.
This is where historians come in; they challenge the accepted consensus (on any historical subject matter) and ascertain whether or not a theory is likely to be historically accurate; this is normally an ongoing operation and has been the accepted means in which to try to prove theories and/or reach the truth as far as is possible for centuries.
Such efforts by historians are in action continually, regarding every aspect of our history, apart from one, which has been completely censored.
Now, this lack of freedom to challenge and/or investigate the historical validity of the Holocaust, means in effect, that we have no way of genuinely proving that the witness testimony is not a small lie, that grew into a big lie , or even possibly due to the powerful and long reaching effects of a Chinese whisper.
To any thinking person there is something intrinsically wrong, inappropriate and unjust, that such legislative measures have/are being put into place; along with the casting of invalid moral aspersions, which are also used as a preventative tool.
What it amounts to is, the removal of individual freedoms, wholesale, only when said freedoms surround investigation and/or debate of this particular subject matter alone.