I cannot find current national arrest statistics for gang members. Thus, I cannot judge whether or not the roughly 2700 immigrant gang members arrested per year is disproportionate.
The article does not draw a clear distinction between legal and illegal immigrant gang members; it only reports such estimated information for the MS-13 gang.
"The research found no 'chilling effect' on the reporting of crime as a result of local law enforcement partnerships with ICE. Instead of spreading this misconception, immigrant advocacy groups should help reinforce the message that crime victims and witnesses are not targets of immigration law enforcement." The Oberlin ICE raids show that ALL illegal immigrants are targets of immigration law enforcement, irrespective of their being victims, witnesses, or gang members.