IHRA does has 31 member countries, they make great store of that, but less so of the fact that only eight countries have adopted its definition of anti-Semitism, interestingly the USA is not one of them.
The definition is not without controversy and the UK's adoption of it does not have cross party support. If legitimacy comes from broad acceptance there is nothing legitimate about it at all.
The UAE is one of the 34 countries with no diplomatic relations with Israel, Israeli passport-holders cannot legally enter the country. The UAE, like most other Arab states, has not recognised Israel since the Arab-Israeli conflict began in 1948. This is official government policy, by the IHRA definition the UAE is a deeply anti-Semitic state and the Deputy Prime Minister of that country is the owner of Manchester City.
Eihad, the sponsor on our shirt and our stadium has an official travel-route map of the Middle East, including Jordan, Iraq, Egypt, Syria, Lebanon and Cyprus — but not Israel or its major cities.
If, as you say, Greater Manchester has adopted the IHRC definition of anti-Semitism, it has not prevented them from becoming deeply involved with the Sheikh in developing huge swathes of East Manchester.
You are a season ticket holder I believe, but the club is owned by an Emirati politician who supports policies, that, by the IHRA definition are anti-Semitic....
"Denying the Jewish people their right to self-determination, e.g., by claiming that the existence of a State of Israel is a racist endeavor."
I'm a season ticket holder as well, it would seem we're passively involved in promoting a deeply anti-Semitic state.