If you want to email people to express your displeasure, there are myriad options. Please do not spam any of these people. This makes the whole movement look illegitimate and sophomoric.
President Ron Leibowitz (president@brandeis.edu) is always a good start, whether you're a student, staff member, parent, alum, or another in support. Note that this email will go to the Office of the President and not his own inbox.
Andrea Dine (dine@brandeis.edu) is the Vice President of Student Affairs (there is no President of this department), the department that oversees DCL. She's a good person to email especially if you're a student or parent.
Marisol Lopez (marisollopez@brandeis.edu) is the Director of Gift Administration. She's a good person to contact if you're an alum considering pausing donations.
The Office of Equal Opportunity (oeo@brandeis.edu) deals with discrimination issues on campus. They're an office, not a person, but still a good email to send.
Lee Bitsóí is the Vice President of the Office of Diversity, Equity, and Inclusion (diversity@brandeis.edu). They're the parent office of the Office of Equal Opportunity. Although his email is not on the Brandeis website, there is a form here to request a meeting with him.