It is difficult to get a handle on the basis of anti semitism in the UK.
I want to caveat this with I'm coming from a place of very large gaps in understanding. It seems to be in several parts;
Existing casual antisemitism in the Christian (or lapsed Christian) British population. Stereotypes and tropes that appear in conversation.
The debate around whether criticism of Israel is antisemitic, which I understand (and I may be wrong about this) to be the basis of accusations of antisemitism in the Labour Party.
The danger to the Jewish community from physical violence and terrorism and the basis of that.
Security and protection of Jewish communities, which is currently disproportionately organised and funded by the Jewish communities themselves.
Lack of visible condemnation and protest of attacks on the Jewish community from the long standing historically Christian British population.
We also like to tell ourselves a heroic narrative in our country's role in relation to the Holocaust, which does not fully reflect the reality. Combined with a visceral horror of the Holocaust and a wish to distance ourselves from the perpetrators of that.
We learn about the Holocaust and historical European pogroms, but there is no connection with the present day.
A majority of the population having no antisemitic thoughts and inclinations, or experience of others who are antisemitic, which leads to confusion and a lack of understanding.
Tensions between Muslim and Jewish communities, which the Christian population are distanced from and have little understanding of.
Connected to the above recent Islamophobia and a wish to avoid Islamophobic behaviour.
There is a disconnect between current violence and threats to the Jewish population and the wider historically Christian population. There needs to be a national connecting of the dots and an honest understanding of how we have got here and what we can do about it.