From the UK Governments report on antisemitism

A proposed amended definition

22.The Macpherson definition that, for recording purposes, a racist incident is one “perceived to be racist by the victim or any other person” is a good working definition, which provides a strong basis for investigation. As such, the perceptions of Jewish people—both collectively and individually, as an alleged victim—should be the starting point of any investigation into antisemitism. However, for an incident to be found to be antisemitic, or for a perpetrator to be prosecuted for a criminal offence that was motivated or aggravated by antisemitism, requires more than just the victim’s perception that it was antisemitic. It also requires evidence, and it requires that someone other than the victim makes an objective interpretation of that evidence. The difficulty of making such a determination in the face of conflicting interpretations underlines the importance of establishing an agreed definition of antisemitism.

23.It is clear that where criticism of the Israeli Government is concerned, context is vital. Israel is an ally of the UK Government and is generally regarded as a liberal democracy, in which the actions of the Government are openly debated and critiqued by its citizens. Campaigners for Palestinian rights have informed us that they would expect similar standards of conduct from the Israeli Government as they would demand from the UK Government. It is important that non-Israelis with knowledge and understanding of the region should not be excluded from criticising the Israeli Government, in common with the many citizens of Israel who are amongst its strongest critics, including human rights organisations in that country.

24.We broadly accept the IHRA definition, but propose two additional clarifications to ensure that freedom of speech is maintained in the context of discourse about Israel and Palestine, without allowing antisemitism to permeate any debate. The definition should include the following statements:

    It is not antisemitic to criticise the Government of Israel, without additional evidence to suggest antisemitic intent.
    It is not antisemitic to hold the Israeli Government to the same standards as other liberal democracies, or to take a particular interest in the Israeli Government’s policies or actions, without additional evidence to suggest antisemitic intent.

25.We recommend that the IHRA definition, with our additional caveats, should be formally adopted by the UK Government, law enforcement agencies and all political parties, to assist them in determining whether or not an incident or discourse can be regarded as antisemitic.