For me, those two paragraphs do not say that Tan was antisemetic in any form. It says that
i) some of the same people received an antisemitic hate letters before
ii) those antisemetic letters used the same wording than the ones sent using Tan’s face
The only implication that I see is that they were likely sent by the same person/group. I see this is very clear in the writing as it is. Zero scummyness in it.
And, this connection, in my opinion, very much justifies including the antisemetic letters in the article. It seems a very relevant information.
Yes, "for you" and clearly, for me, I did not draw the conclusion that Garry's motivations were antisemetic. That's not the point. Journalists publish articles for an extremely broad audience, and there's a high degree of responsibility and ethics required of the author while publishing; a degree that, to be clear, I do not feel this author met.