Because of the general public's interest in fictional and real life Cosa Nostra figures...the targeting and prosecution of alleged members is "leading story" "press conference" material.

Street gangs which commit more violent acts.....or other ethnic mobs involved in the trafficking of women and kids are also targeted by fed. and state law enforcement but not as "newsworthy" as deemed by those who make those decisions.

Street killings and forced slavery/prostitution don't get the same headlines as the word "mafia"...or the same amount of l.e. resources.

"Mafia" is the golden goose for feds....careers are made with high profile convictions.