I don't know that the Sussex Squatters are "enraged", but they are hyper reactive to anything that remotely relates to the Snarkles. Harriet has a big spread in Hello!, with fashion photos and in her article she praises her husband's family. Apparently this set them off.

https://www.dailymail.com/news/royals/article-16267825/Meghan-Royal-Family-Sussexes-Peter-Harriet-Phillips-RICHARD-EDEN.html

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