The phrase large number seems at best exaggerated especially as a the given source does not cite a number of Bosnian and or Muslim participants at all describing them and their activities only in vague ominous terms and b the source Icon of Evil Hitler s Mufti and the Rise of Radical Islam ISBN 9781412810777 appears almost egregiously slanted and unworthy for use on Wikipedia I think it may be valid to include information about Bosnian volunteers and their mobilization by this particular Mufti but it needs to be sourced from elsewhere and worded more carefully Having studied the Einsatzgruppen especially Einsatzgruppe D more than the average self educator could begin to consider enduring and having never before seen this source or this information more of an accusation really I find the tone of the whole assertion and citation highly problematic