I wouldn't stand up for myself honestly.
There comes a point in one's life that you gotta realize:
Anyone who jumps anyone over sitting at a lunch table is a Neanderthal and should be left alone.
That person sounds mentally unstable.
And these people definetly don't have their priorities in check. In other words, they are idiots.
And you cant reason with idiots because they don't think.
So do yourself a favor and sit somewhere else and stay out of it.
Because these people sound like idiots who want a reason to fight and they probably love to fight. So don't give them a reason.
Doesn't mean your a wimp. It means your smart enough to recognize someone really immature.
Good luck!
p.s.** this statement does not mean I think any or all Mexicans are idiots**