DMI's no joke either.
DMI are more of an issue inside the prison system more so than on the streets. MS13 and DMI are on two totally different ends of the spectrum. While DMI can be violent, MS13 are wrong look away from homicide.
DMI started out as "hitmen" for the BGF and actually applied for membership in the BGF. This of course is not allowed due to the fact that membership in DMI is damn near all white and a white man cannot become a member of the BGF. The leader of the DMI however, was given permission to form the gang by the BGF due to the good working relationship they had with each other.
DMI has since splintered a bit into two different sects, DMI and POA (Power Over All). POA is the more white supremacist faction where as DMI still works as a freelance hit squad and drug importer. The DMI's leader is a pretty big dude that I have dealt with in the past. To my knowledge, he's never given staff any problems, but his stooges have.
MS13 usually don't give us too many problems overtly as their numbers are not all that great at any one institution. They prefer to stay under the radar, at least in my experience. The thing with MS13 is that when they do go off and start stabbing, they'll stab anyone they encounter, so big guns may be needed to shut there shenanigans down.