Does your client's home country allow peaceful protest? Who is considered a citizen of that country? Is there a law forbidding discrimination? Foreign law can answer these questions. We have primary legal materials for many countries and secondary sources for many other jurisdictions. For more information on researching foreign law, see Foreign and Comparative Law Research Guide.
Center for Gender and Refugee Studies
CGRS maintains a database of US and foreign asylum cases which you can filter by nationality, type of persecution or outcome.