Were there any Jews that supported the Nazis during World War II?

While I can not speak for any individuals motivations, there were some Jewish people that did help Nazi interests.

Group 13 (named for the address of their HQ) is a fantastic example. In 1940 Warsaw ghetto, Poland, there was a group of Jews that reported to the gestapo, essentialy operating as spies, as well as trying to influence and control the Judenrat (explained below) monitor black marketing, and other criminal activities. They also made some good money blackmailing and racketeering and smuggling! They had their own prision, and eventally an infirmary and ambulance service, but continued many illegal activites. In 1942 most of the group 13 members were executed.

There were also "Jewish ghetto Police" That is Jews that were delocalized, and set out to be a police force in the ghettos. In a large ghetto such as warsaw, there were thousands of these. Claims exist that they were even more brutal tha n their Nazi counterparts. However, these Jewish police held no special place to the Nazis, and all met the same fate as their non "police" brethren.

Then there were the Judenrat. That is, small (12-24 people) groups of the community leaders that were put into positions of small power, and were required to search households, present German officials with Jewish population numbers, gather congregations of slave laborers for the Nazis, confiscste goods, as well as doing practical government work suh as securing supplies, ensuring there is food. Likely few or none of the judenrat supported or liked the Nazis, they just did it out of fear and nesscesity.

http://warszawa.getto.pl/index.php?mod=view_record&rid=18011998122932000097&tid=osoby&lang=en