(hisotry professors, please correct me)
It is important to note that settlers in Texas were not foreigners, but had given up citizenship in other countries (a large number from Germany, Czechoslovakia, and the United States) and had taken an oath of Mexican citizenship for a grant of land BEFORE Santa Ana (the BRUTAL dictator) took power. Texicans had a somewhat independent government. Santa Ana, however, declared himself "Emperor" and attempted to repeal all Texas land grants and remove a democratic legislature - hence the Texas War of Independence.
A large percentage of those who fought against Santa Ana were Latino.
It was a massacre.
Any bets on why illegal immigration is condoned in Mexico? (nothing to do with economics, everything to do with Mexican nationalism)