I learned this lesson last year while I was applying to medical school. I am an M1 despite it all, sigh. NEVER INCLUDE ANY INFORMATION ABOUT YOUR RELIGION, SEXUALITY, FAMILY, WEALTH, MENTAL STATUS, IMMIGRATION ETC. (You get the idea.) Learn this lesson now so it doesn't keep biting your !@!@!. When you bring it up in an essay it become fair game. Just like if you bring up research, GPA, clubs, volunteering. So, just as much as an interviewer has opinions about these topics, so will he/she have opinions about your personal information. Diversity? HUH? This is true. . .but know this secret: interviewers are focused on your scientific potential first and foremost. Second to that is anything they feel personally makes a good doctor. Looks play a huge role in interviews too (hence all of the good looking people at my school) as well as manners. My experience is that keeping your "diverse" experiences (I would say your personal life) out of the mix is the surest way to play it safe in an application. Immigration is a huge controversy in many ways (it is anywhere in the world).
I mentioned my religious affairs and marriage in my application since it fueled a lot of my academic pursuits that I had to explain and time spent abroad. I regret it all. I say don't bring it up in an application. I had one interviewer flat out criticize my marriage to a Muslim (Arab) and questioned me about what my parents felt about it. He even asked about the prominence of my family and my husband's. He even criticized my grades because his daughter did better in classes that I took. I was stunned. But I realize he would have never asked me if I didn't share this info. So, no matter how much you wanna share, (even with good reason) DON'T! I didn't complain (should have, although this school was 2nd to the botton on my list of top schools) and I was rejected. I left the experience very pessimistic about and disappointed in what my life will be like as a med student and doctor. BUT I am *&*& glad I ended up where I did. And I basically keep my relations with people associated with med school on a professional and distanced level.