Jeremy Corbyn's friends re-examined per The Jewish Chronicle

The whole of this JC article is worth a read http://www.thejc.com/news/uk-news/142706/jeremy-corbyns-friends-re-examined but especially the end:

'On Tuesday, several anti-Israel activists signed an open letter attacking the JC.

Signatories to the letter included Tony Greenstein, Professor Haim Bresheeth, Abe Hayeem, Miriam Margolyes, Professor Ilan Pappe and Michael Rosen.

...

The signatories to the letter claimed Mr Corbyn had "nothing to apologise for" following his meetings with representatives of Hamas and Hizbollah.

The letter continued: "Hamas was democratically elected in Palestinian elections generally accepted as fair, and Hizbollah also has strong electoral support in Lebanon."'

Absolutely Hezbollah has strong electoral support but then so did the Nazis, would the signatories of that letter have deemed meeting with them 'nothing to apologise for'?

Let's have a look at the people that Tony Greenstein, Professor Haim Bresheeth, Abe Hayeem, Miriam Margolyes, Professor Ilan Pappe and Michael Rosen think that meeting with are  'nothing to apologise for'.

Hamas in 2000 said:

'The so-called Holocaust, […] is an alleged and invented story with no basis. . . . The invention of these grand illusions of an alleged crime that never occurred, […] clearly reveals the racist Zionist face, which believes in the superiority of the Jewish race over the rest of the nations."'

So Holocaust denial is 'nothing to apologise for'?

Hamas's Charter says Jewish people "have only negative traits and are presented as planning to take over the world."
 

So anti Semitic slurs are 'nothing to apologise for' ?

Hezbollah's leader Hassan Nasrallah, speaking at the Shi'ite Moslem "Ashura" flagellation ceremony on 9 April 2000, said:

"The Jews invented the legend of the Nazi atrocities.... Anyone who reads the Koran and the holy writings of the monotheistic religions sees what they did to the prophets, and what acts of madness and slaughter the Jews carried out throughout history.... Anyone who reads these texts cannot think of co-existence with them, of peace with them, or about accepting their presence, not only in Palestine of 1948 but even in a small village in Palestine, because they are a cancer which is liable to spread again at any moment."'

So Holocaust denial and anti Semitism are 'nothing to apologise for'? 

Hezbollah's leader Hassan Nasrallah was reported to have said:
"if [Jews] all gather in Israel, it will save us the trouble of going after them worldwide."
 

So anti Semitism and threats of a new Holocaust are 'nothing to apologise for'?
 

Hezbollah's leader Hassan Nasrallah who also said:

"If we searched the entire world for a person more cowardly, despicable, weak and feeble in psyche, mind, ideology and religion, we would not find anyone like the Jew. Notice, I do not say the Israeli."

So blatant anti Semitic slurs are also 'nothing to apologise for'? 

If Jeremy Corbyn's supporters say that meeting with Hamas and Hezbollah is 'nothing to apologise for', bearing in mind the above, then what would they say would be worth apologising for?