Not sure why you say that, but AFAIK in all places where Holocaust denial is illegal, that applies to everybody equally. Yes, an ordinary person expressing the "opinion" that the Holocaust did not take place would be sentenced just like this local politician was.
See https://en.wikipedia.org/wiki/Laws_against_Holocaust_denial, I can't see any special cases for politicians or other public figures there.
1) "You're under arrest"
2) "Fuck off, nerd"
798 prosecutions for Nazi activities in 2017, 409 in the first half of 2018. These are not all politicians, nor all the occasional public figure like David Irving. They are average Joes, posting or saying something in public or drawing swastikas on things.
The article doesn't say what activities were prosecuted in detail; the law prohibits much more than just Holocaust denial: https://en.wikipedia.org/wiki/Verbotsgesetz_1947, but all of them are of the form "you are not allowed to say certain things".
You might meet a right-wing policeman who doesn't mind, or you might have to put something in writing or be caught on camera, but overall these are not things that the justice system takes lightly.
The law you're referring to is - IMO - a violation of freedom of speech.
_Unless_ you're a politician. Because then - in public - you are in your official capacity, so you don't have the same "freedom of speech" in that capacity - your statements carry a different weight (which is why you chose to be a politician supposedly.)
This politician did not tell this to his wife at dinner at home. He made a speech on Remembrance Day in 2010.
>>On Holocaust Remembrance Day in 2010, Pastörs, then a member of the local parliament in the German state of Mecklenburg-Vorpommern, made a speech in which he claimed the commemorations were “theater” and claimed that “the so-called Holocaust is being used for political and commercial purposes.”
Politicians have lots of privileges and visibility in society, and with those comes the responsibility of being accountable for what they say.
>>A seven-judge panel found that far-right German politician Udo Pastörs had “intentionally stated untruths in order to defame the Jews and the persecution that they had suffered during the Second World War.”