Can a USA felon become a mexican citizen by his mom and dad?

Becoming a citizen of another country generally depends on the citizenship laws of that particular country. In the case of Mexico, while having parents who are Mexican citizens could potentially be beneficial, it does not automatically grant citizenship to a US felon. Mexico has its own immigration laws and processes that need to be followed in order to obtain citizenship. It is advisable for someone interested in becoming a Mexican citizen to consult with Mexican immigration authorities or an immigration attorney for accurate and up-to-date information about the specific requirements and procedures.

Is it yes or no?

No, having parents who are Mexican citizens does not automatically grant citizenship in Mexico for a US felon. The individual would still need to go through the proper immigration processes and meet the requirements set by Mexican authorities to obtain citizenship.