Why was it so risky for the Jews to cross the open border between Poland and the soviet union?

Crossing the open border between Poland and the Soviet Union was risky for Jews due to the volatile political climate and the presence of hostile forces. Many Jews faced the threat of persecution from both Nazi Germany and the Soviet authorities, who were wary of refugees and could view them as potential political dissidents. Additionally, the journey was fraught with dangers, including the risk of arrest, deportation, or violence from border guards and local populations. As a result, the decision to cross was fraught with uncertainty and peril.