Apichart static Niramai (2553) doing research. Who was yellow - red. Has studied the Red Shirts in Bangkok, Chiang Mai, Ubon Ratchathani research found. The main reason to join and support the movement of the red shirts is 28.13 per cent join the red shirts because they do not like the double standard. From this information, Apichart static Niramai has concluded that the grievances of the red shirts is. Political grievances caused by the insult. The perception of discrimination. No Sem sector