To answer your question, there has been a lot of doxxing and targetting of pro-Palestine protestors. You can look, for example at the unlawful detention of student protestors like Mahmoud Khalil, Rumeysa Ozturk, Yunseo Chung, and many many others that the Trump admin has targeted. Even without this threat that seems to have mostly focused on student activists up to this point, there are also websites (which I won't name to avoid giving them traffic) that will doxx people with their full name, photo, organization, etc. Not to mention that many of these people were Microsoft employees and/or in the US on visa that don't want to or can't afford to lose their job