Ackman targeted Gay because she resisted pressure to crack down on pro-Palestinian protests at Harvard.
The "plagiarism" that was found in Gary's work is much less serious than the plagiarism found in Oxman's work. Unlike Oxman, Gay fully attributed everything to the original authors. Gay didn't try to misrepresent anyone else's work as her own. She paraphrased too closely, but she did cite the works she was paraphrasing. Oxman just ripped passages from Wikipedia without any attribution.
The "plagiarism" that was found in Gary's work is much less serious than the plagiarism found in Oxman's work. Unlike Oxman, Gay fully attributed everything to the original authors. Gay didn't try to misrepresent anyone else's work as her own. She paraphrased too closely, but she did cite the works she was paraphrasing. Oxman just ripped passages from Wikipedia without any attribution.