They do this so the Polish smugglers won't be able to understand them. This was a good idea, particularly for the Jews relying on Yiddish language, in order to convey secrets among themselves. The Jews have no trust to the smugglers in front of them, and so they use the language to have an advantage.
<em>Historical Background</em>
The history of the Jews in Poland dates back over 1,000 years. Many children were smuggled to Poland, where the conscription of Jews did not take effect until 1844.
If you are asking due to the 15-1600s, then it's because the women back then were considered "unlawful" or "unacceptable" when they realized that they didn't have to be thrown around by the men. Women also did "witch-like" things such as warts, and long nails.
The Compromise of 1850 and the Kansas-Nebraska Act also worked to obtain similar results. When the newly founded Republican Party (the first real anti-slavery party) won its first election in 1860 with Abraham Lincoln, the South feared that the government would infringe on its rights and interests, which led to secession, and then the Civil War.
Falling prices. Farmers were in dire economic straits because prices for agricultural products such as cotton and wheat had significantly dropped, while consumer prices for goods and services continued to rise. Debt and foreclosure. Working conditions were terible there wasnt no safety and child laboring was occurring.
I believe it’s A hope this helps