Killing another 'mob-like family' is a long drawn out process. Bare in mind these Lebanese (who for the most part are now productive members of society) tend to have above average birth rates and so for each coordinated attack (which are fairly infrequent due to the nature of such attacks and the effort which is put into it) another dozen or so are of the maturity to replace whoever was taken out.
The most effective way is to sweep the carpet from underneath them metaphorically speaking. Kill the children first and wait for the bosses to die of old age. In doing so one can ensure that their drug empire/cartels can control most of the territory and as such 'run the streets'.
The Jews know this process to this day. And it's why Jewish crime syndicates exist everywhere they exist. Even the Jewish state are mostly known for their special forces ability to assassinate their opposition outside of the field of combat, sell weapons to whoever will buy them, spy on their closest ally the United States, steal resources from their neighbours.
So yes, if anything all there is to be dissapointed about is the Jews thought of it first. Damn Jews. Hitler had a point - it was the bayonet he used to impale Jewish babies.
[amidoingitrite?]