Maybe not for the Tories, depending on what stripe of Tory. Formally the Tories are the "Conservative and Unionist Party" because notionally one of the key things they stand for is that very specific United Kingdom including Northern Ireland. They are, at least in principle, a proudly Unionist party, which is why so many of the Irish Unionists† were disappointed about Tory Brexit policies.

And I imagine the Blackshirts, or whatever we're calling this current version of Nazi morons would think you meant it to suggest, as they believe, that "their" country has been overrun by foreigners.

† In Ireland a Unionist wants Ireland, at least part of it and in many cases all of it, to be "united" with Great Britain. Contrariwise Nationalists want all of Ireland to be a single uh, independent nation. These groupings correlate to varying degrees with which flavour of Christianity (if any) you practice, and with whether you want a Republic or Royalty. The trivial stereotypes would be a Protestant who wants the King of England to also rule the entire island of Ireland, and a Catholic who believes the entire island should be an independent Republic. One thing almost everybody appears to have agreed on is that murdering each other wasn't solving anything. So that's good.