First of all it is important to note that Viktor Orban (as recognized by Israelis) is one of the few European leaders who is a true friend of Israel and the Jewish people:
So, for example, despite its antisemitic history (and certainly antisemitic beliefs there are still widespread), synagogues in Hungary now do not need police protection like they do elsewhere in Europe. Of course, a major part of the reason for this is that, unlike other European countries Hungary has few Muslims - primarily because Orban has refused to give in to demands for Hungary to take their share of the millions of recent 'migrants' who happen to come from Islamist countries. And it is because of this refusal - and his insistence on protecting his country - that he has incurred the wrath of leftists all over the world including Soros and the Board of Deputies, because in their minds this makes him 'Islamophobic'.
But what has this got to do with the Board of Deputies of British Jews anyway? This is where it gets interesting. Notice that their statement includes the vicious and bizarre libel that Orban is also antisemitic on the basis that he and his party have campaigned against "Jewish philanthropist George Soros". Ah now that would be the extreme leftist Soros who actually renounced his Judaism long ago, worked happily for the Nazis during WW2, and spends many of his millions of dollars funding organisation dedicated to the destabilization (and eventual destruction) of the State of Israel - as well as attempts to remove from power any governments - like Orban's - that do not buy into his globalist leftist agenda (which is why Orban has tried to stop Soros meddling in Hungary's internal affairs).
But the Board of Deputies has plenty of form when it comes to trashing friends of Israel while cosying up to its enemies:
On friend of Israel and lover of the Jewish people Katie Hopkins:
And of course it comes as no surprise that the BoD is now pushing a series of events which are strongly hostile to the Israeli government and not only promote the Palestinian narrative of lies about why there is an 'absence of 'peace', but actually promote the Palestinian flag (they have plenty of form on this see, e.g. here and here):
See also: Board of Deputies: the friend of my enemy is my friend, the enemy of my enemy is my enemy