Poles attacked lorries at the border. Who is behind this? And how will Ukraine respond to the protests? Expertise of "Gromada"

As a result, the grain that the Ukrainians transported in transit to Lithuania simply spilled onto the road. It happened at the checkpoint "Yagodin - Dorogusk". Later, the situation on the border became even worse. Farmers from Poland started throwing tires and lighting fireworks on the track. According to Polish law enforcement officers, the drivers who were attacked returned home to Ukraine.What doesn't suit Polish farmers? Why are they blocking Ukrainian grain at a time when three times more grain goes to the European market from the Russian Federation than from Ukraine, but the protesters do not even mention Russian grain. Who is behind the blockade of Ukrainian trucks? Who is leading these protests? And do they have a purely economic basis? "Gromada Group" understood.