How times have changed in Texas, in the 70’s we were taught, if you are from south Texas your job is keepin the Mexicans in Mexico
If you are from north Texas,your job is keepin the Okies in Oklahoma
When I lived in Texas the issue was keeping Alaska from becoming a state, so Texas would remain the largest state. Obviously that was a long, long time ago.
I was born in TX, but have lived in NM and OK. Both have some fine people in them.
The only difference we have with OK are about Sports. (I am totally disinterested in sports)
Most of NM is not that different from TX, except Abuquerque and Santa Fe. (except for Rio Ariba county, insane)
If TX were to ever leave the US, about 1/2 of the nation would bolt with it.