I think one of the reasons that there's still a grudge is that Qadhafi denies responsibility. Under the Libyan offer, each victim was to receive $10 million: $4 million to be paid when UN sanctions are lifted; $4 million once US sanctions are lifted; and $2 million when the United States takes Libya off the State Department’s list of state sponsors of terrorism. Despite the compensation offer, Libya’s head of state Colonel Qadhafi refuses to accept personal responsibility for the Lockerbie bombing. The Libyan leader has had a deep of the United States and compared America to Nazi Germany.
There are also the issues of WMD in Libya, as well as state-sponsored terrorism.
It's sad though, that all this extends into the world of sport.