The social conflict in Bolivia has split the country once again. The road blockade led by Indigenous peasants, which has besieged La Paz for more than a month, has brought expressions of racism to the surface in the capital. Worn down by the lack of gasoline and food and by soaring prices, some residents lash out at the protesters —and the hostility runs in both directions.

La Paz has spent a month under blockade. The main roads into Bolivia's administrative capital have been cut for four weeks, and shortages of food and fuel worsen by the day.…

Bolivia's political crisis threatens to spill over into confrontations between urban and rural populations, after nearly a month of road blockades that have disrupted supplies of…