You did not bother reading the article. Kennedy made a deal to import alcohol, WHEN PROHIBITION ENDED!!!. That made him a legal importer, not a bootlegger.
Al Capone had his brother, Frank, unleashed terrorist attacks on Democratic voters in support of Republicans in the Chicago suburb of Cicero. No one had ever seen anything like it. Finally, the Cook County begged for Chicago to send police to Cicero. Police arrived too late to stop the violence during the election, but early enough to witness the tail end of the violence. Frank Capone furious that there were witnesses tried to kill the police, only to die himself.
Capone never forgave the Democrats for killing his brother, and always supported the more criminally compliant Republicans.
Nixon pardoned Jimmy Hoffa, on the promise he would surrender the Teamsters completely to organized crime. As it turned out Hoffa did not understand the deal he was making. Nixon also pardoned about 200 other key members of organized crime, and destroyed the FBI's organized crime teams.
There is no doubt that many local Democratic Party groups were infiltrated by organized crime, but the Republicans were infiltrated at the highest levels.