But that's not what she said originally. Saying that there are differences isn't suggesting a hierarchy, or diminishing other people's experiences. The interview this week, says she was asked about her initial letter, and if she regretted the incident. Her reply, "No, not at alll". The bit you're quoting is just part of what she has said - but the other quotes suggest she is doubling down on the original argument.
That letter didn't simply say that racism affected different groups in different ways, it said that Irish, Jewish and Travellers didn't face racism, they faced 'prejudice', which was different. And she then said that people with red hair also faced prejudice, further diminishing the experiences of those groups.
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