The revolution began in October 1835, after a decade of political and cultural clashes between the Mexican government and the increasingly large population of American settlers in Texas. ... Colonists and Tejanos disagreed on whether the ultimate goal was independence or a return to the Mexican Constitution of 1824.
They broke all their laws and rejected their culture even though they were legally under control of Mexico. They refused to free slaves and stop importing them, they refused to convert to Roman Catholicism, and smuggled. Texans were mostly white Americans who immigrated there for money and opportunity. So, there was tension between the native Mexicans and the Americans. These factors created enough tension for Texans to finally openly defy Mexican rule rather than avoid laws or accept them unhappily.
