It was their loyalty to General George Washington. Though many deserted after several defeats, there were those who still believed that they can win and more importantly they believed that Washington will be able to do it. Even though it was cold and there was ice in the river the men still obeyed Washington where they successfully crossed the Delaware and took Trenton from the Hessians.
The correct answer should be People felt a pressure to conform to avoid suspicion
Everyone was afraid of being branded as a communist and it could happen because of anything. Those people would then have various issues in their lives even though.