Why do people use this ridiculous comparison? This would be more accurate.
Imagine if tomorrow the British were made the only "white Christians" on the planet. And imagine someone colonised them and 80% of them were exiled to go and live around the world, and that in each one of those places they were massacred, lived under apartheid, forced to convert their religion on pain of death and even burned like witches. For say, about 2000 years.
Then let's say the 20% who were left behind in Britain were dominated by the majority. Told they couldn't be in government or the military. Forced to live in Ghettos. Told they had to defer to their masters in the street. Told they couldn't socialise with or marry with their new masters. Forced to wear yellow stars or similar to identify them as lower class citizens. Imagine rights of law were taken away from them, and they were told they couldn't testify in court against their new masters. Imagine if they were routinely beaten, murdered (sometimes in their thousands) for absolutely no reason and that children would throw rocks at them in the street.
Then a war happens and their "new" masters are toppled. And the British said "umm, okay, we don't like living like this so please can we have our own country?" and that this is debated for some time and while that's happening the 80% who were exiled and sent around the world have now, after 2000 years on ongoing massacres and edicts stopping them from existing in any freedom of any kind, have been almost completely exterminated by a lunatic gassing them in showers while the world stood by in silence.
So imagine the world says "hmm, maybe the British should actually have a bit of this country for themselves. Seeing as they are from here technically and basically everyone keeps killing them? Fair enough right?".
That is more accurate that someone showing up in Britain and asking you to give up your house. It really isn't on to diminish the reality of Jewish History.