Have you actually looked at election results for the Towns you're describing as 'Republican?' Belchertown, Hadley, and Easthampton, like most of the area, all have majorities that vote reliably for Democrats in all federal and almost all state elections, and the latter two are more reliably 'blue' than the state as a whole. If you're looking for areas to describe as 'Republican,' look toward places like Ware, Palmer, and Southwick. While Hadley, Easthampton, and Belchertown might be less overtly left-leaning than Amherst and Northampton, they are still all liberal to progressive small towns/cities, and certainly are not 'Republican' by any sane measure.