Who are the Rechabites? According to Wikepedia they are:
Rechabites - the descendants of Rechab through Jonadab or Jehonadab. They belonged to the Kenites, who accompanied the children of Israel into Palestine, and dwelt among them. Moses married a Kenite wife (Judg. 1:16), and Jael was the wife of "Heber the Kenite" (4:17). Saul also showed kindness to the Kenites (1 Sam. 15:6). The main body of the Kenites dwelt in cities, and adopted settled habits of life (30:29); but Jehonadab forbade his descendants to drink wine or to live in cities. They were commanded to lead always a nomad life. They adhered to the law laid down by Jonadab, and were noted for their fidelity to the old-established custom of their family in the days of Jeremiah (35); and this feature of their character is referred to by the prophet for the purpose of giving point to his own exhortation.They obeyed. They were a people surrounded by cities, farms, wine drinkers etc. And this group within a group held to the ways that their father had set before them. They didn't get hung up on a mindset of "but everyone else is doing it". They simply obeyed.
This is what God wants his people to see. That simple straight-forward obedience.
It is what I need to see as well.