The context of this Question How do I respond to "if you had kids with a white girl, they’d look like [the guy next to me]"? is abundantly clear to an individual whom has experienced one or more interactions of the same or similar ilk.
Simply because one or more users or moderators are ignorant as to the context of the inquiry
I’d like to understand her motivation for saying that, but I didn’t ask about it at the time and it would seem odd to bring it up again in the future.
does not mean that you should place the Question "on hold" or delete answers which provide an appropriate answer to the Question:
Even though it’s unlikely the remark would happen again, what in retrospect could I have said or retorted?
Your collective conduct of deleting questions and answers is effectively censorship of contexts which you clearly have not experienced and do not understand in the least bit.
The appropriate action for users and/or moderators whom do not understand a subject matter or context is to do what you did in the first instance: ask what the context is.
The inappropriate action is to delete comments and answers which provide answers to your purported requests for clarification where the users whom voted to place the Question "on hold" and/or to delete an Answer to the Question still do not understand the Question - as you simply have no experience as to the subject matter or cultures involved.
Kindly un-delete the above-linked Answer, and remove the "on hold" mask/flag for the Question itself. The Question is not a simple one to ask, consider the reasons therefor, process accordingly and make a rational and informed decision as how to act get the answers OP is seeking. A user is using your site in an attempt to get answers, your site has closed the Question for no other reason than your collective ignorance of the context and subject matter - while simultaneously deleting the one Answer which provides a clear path for OP to follow to get their answers and then make their own decisions moving forward.