Goliad is the shame of Texas!
Given what happened at Goliad, it probably didn't make much difference whether he defenders of the Alamo surrendered or not.
I've always thought it odd that the battlecry at San Jacinto that has been remembered was "Remember the Alamo!" At the Alamo the Mexicans played by the rules, admittedly very harsh rules.
At Goliad they massacred men who had surrendered on promise of their lives. Seems like "Remember Goliad!" would be a more logical warcry.
Except that it just doesn't scan as well.