<p>It is a religion and a culture, but it is certainly not a race. The US is full of different cultures, and if they wanted to know that, they would put it on the app. They do not. I think it would not be to your credit to misuse the ethnicity info to try and look like an URM. </p>
<p>If it is so important to you, work it into an essay. But, remember, you do not know the subtle, or overt, prejudices of the people who will read your apps.</p>