[SecondAmendment]

Here is my $0.02 on why the mob did it anyway:

• Kennedy was schtupping Giancana's mistress.
• He was double crossing them by having his brother investigate them.

[pacificus]

That’s totally possible...

CIA was afraid he’d shut them down, so they tried to “scare him” into action.

Never trust the mob.

[montag813]

Or as Mario Puzo put in Michael Corleone’s mouth: “If history has taught us anything, it’s that you can kill anyone.”