You guys have a problem with ethnic Punjabis or the province of Punjab?
If it is ethnicity (read, racism), what's the next step? Divide Karachi into 10 financially and politically autonomous areas?
I think most ethnic Punjabis have problem with non-Punjaibs (read, racism).
To name some examples:
Many Punjabis abuse ALL new Sindhi people in the guise of abusing MQM.
Many Punjabis were on the streets to support a Punjabi judge but were silent when a Sindhi judge was attacked by Punjabi goons of Nawaz League.