[redcatcherb412]

As these people move north we will be able to tell where they have intend to cross

You can be sure they will cross at a sanctuary state. Cali or NM. Being it's a San Diego activist group leading them, Tijuana would be a good bet.

[USNBandit]

My guess would be the shortest walk with the intention of exploiting refugee policies and delayed return of OTMs (other than Mexicans).

These people are coached to claim refugee status and not reveal their country of origin, saying they fear for their safety if repatriated. In our warped system this gets them released with a court date.