What does the red stripe in mexico's flag symbolize?

The red stripe represents the Spaniards that joined in the quest for Independence and the blood of the national heroes.
https://amhistory.si.edu/militaryhistory/collection/object.asp?ID=235
this is where i got my answer

Hello i hope you are having a good day : ) answer : hello i would say my favourite holiday is st patrick day on st patrick day i celebrate on the 17th of march when the traditional death date of saint patrick, the foremost patron saint of ireland. my family just celebrate it and have a great time seeing each other from other countries like a family group meet up. i would say it is my favourite family holiday because its fun singing songs.   information : celebrations generally involve public parades and festivals, irish traditional music sessions (céilithe), and the wearing of green attire or shamrocks bringing good luck to your self and your family wearing green.hola, diría que mi fiesta favorita es el día de san patricio en el día de san patricio que celebro el 17 de marzo, cuando la tradicional fecha de muerte de san patricio, el principal santo patrono de irlanda. mi familia simplemente lo celebran y tienen un gran tiempo para verse desde otros países como un grupo familiar reunirse. yo diría que es mi favorito de vacaciones en familia porque su diversión cantando canciones.   información: las celebraciones generalmente implican desfiles públicos y festivales, sesiones de música tradicional irlandesa (céilithe), y el uso de vestimenta verde o rocas que traen buena suerte a su ser y su familia vistiendo verde.