Earlier quoted context omitted.
Many drug cartels in Mexico get their training from the retired army personnel from Israel, USA. So, what can the USA/Israel do in such a case? Either ban any training given by retired folks; or give fat pensions to such people and make them sign agreements that prevent any private training whatsoever.
Why would the US or Israeli militaries be powerless to say "you can't use your training to help train up cartels and if we find out about it, that's your ass"?
I mean, Congress could pass laws, but then you’d need to define a cartel, prove it in court, prove they were training, etc.