So you have the Hollywood view of the Alamo. Those at the Alamo had an arsenal of cannons, vastly more than Santa Anna. They believed Sam Houston would come with the Texas army for those cannons, which is how they held off the initial wave attacks. When they learned Houston would not come Santa Anna had already given the death ultimatum. The line in the dirt is a myth as at that point they were surrounded and there was no escape. They did not decide to make the "ultimate sacrifice." They miscalculated Sam Houston, were surrounded, and had been told no prisoners would be taken alive.
At least you are one people who believes Hitler was correct to tell Germans at Stalingrad to fight to the death of the last soldier and his declaring all Germans should die rather than surrender - since that is your repeated view now.