What has been done to support the Holocaust denial?

Nothing, they knew nothing of the plans of the Nazis and the few that had some idea were in denial that any country could consider any such thing.

The Holocaust was genocide. It an attempt to kill all Jews. It was not some dispute that could have been 'resolved'.

Please see the related questions.

It is hard to see exactly what could have been done to stop it. Please also see the related question.

What lines support the idea that Macbeth does not want to tell his wife about Banquo's murder until after it has been done?

No the child is an adult then and no support is needed. This should have been done when he was a child.

The holocaust to me is the most evil thing ever done in the history of mankind

absolutely nothing. the holocaust is done and over with, so we don't need to worry about it now

There have been recent plots of terrorism in the UK and little has been done to combat this. There are many known to support terrorism but little is done.

yes, but as they did not know that the Holocaust was going to happen, the question is moot.

In the Holocaust most of the gassing was done on an "industrial" basis.

The outcomes of all twins in the Holocaust all resulted in death, a single injection of chloroform, directly in the heart, causing them to die almost instantly, but before there lives were taken, many tests had been done on them.

The most memorable happening in Germany is the Holocaust. There are plenty more, but the Holocaust is the most famous.

all of the killing was done by Christians

He was the Chancellor and leader of Germany and the one who masterminded the Holocaust. Hitler cannot be considered a mastermind, it was done in his name, but the overseeing was done by Himmler and the actual planning was done by people like Eichmann and Heydrich.