"We are experiencing this violence for weeks and months. The groups unite based on ethnicity, religion or clan structures and attack each other with knives and homemade weapons," Rainer Wendt told the German newspaper Passauer Neue Presse.
According to the DPoIG chairman, Sunnis and Shiites, two main groups in Islam, are fighting each other in refugee camps, attempting to enforce their rules, while Christians in the camps are being oppressed.
Wendt insisted on quick deportation for those asylum seekers found to be committing crimes in Germany.
The European Union, including Germany, is trying to manage a massive refugee influx, as hundreds of thousands of people flee conflict-torn regions in the Middle East and North Africa, seeking asylum in the bloc.
According to German Vice Chancellor Sigmar Gabriel, up to one million asylum claims are expected to be lodged in the country by the end of 2015.