The economic crisis erupted, and the relationship deteriorated was not only between the Prussian and Polish. As the source of this economic crisis, the British were the ones who drew the most hatred.
It didn't matter that they engaged in dumping; the problem was that they dumped their goods on the European Continent. In the international relations of this age, looking at the European Continent was enough, and the other countries could be ignored.
Everyone was already facing overproduction, and the British dumping directly detonated the crisis. Without a doubt, all government authorities pushed the blame onto the British.
In Paris, patriots had taken to the streets again. This time it was not against the government; they were calling for people to boycott British goods and support domestic products.
The same scene occurred in many cities across Europe, where naturally, capitalists were behind pushing things. The British had snatched the market, threatening their very survival.