Italian politics is not English, Northern Irish, Scottish or Welsh politics (each of which have their own unique character).
Whilst there are commonalities, cultural differences and history do have a massive impact.
Brits have a tendency when talking about politics in other countries to fail to that into consideration and apply British politics to their understanding, which is a fundamentally flawed thing to do.
For example anti immigration /racism has a very different nature in different EU countries because of the pattern of migration it has experienced. The French have issues with their Algerian history whereas the British have issues with their Indian Empire history.
I think there is a danger here of British / Italian differences getting in the way here for this reason.
It's also true that British politics because it has been traditionally much more stable and consistent has an impact beyond its borders. It removes world political stability in a way that Italian politics does not.
As for what to do, I think that merely talking freely about your political beliefs is underestimated. Other people will talk if you talk. And that has a ripple effect. That's why MN is powerful.
More direct action like campaigning & letter writing is also good.
Show support to people you agree with and share values with. People like Amy Brooks and Victoria Atkins. Counter the abuse they might be getting to make it worth their while to put head above parapet