"Jamaat-e-Islami leaders are being tried and executed (in Bangladesh) because of their love and loyalty for Pakistan and on the other hand the Pakistan regime acted as mute spectator," Geelani said in a statement here.
Bangladesh's Supreme Court yesterday upheld the death sentence for top Jamaat-e-Islami leader Abdul Quader Mollah, infamous as the "Butcher of Mirpur", for 1971 war crimes.
He was hanged last night.
Criticising the "criminal silence" of Pakistan government, Geelani said it has proved that they are "extremely ungrateful."
"It was politically motivated and against all norms. Qadir and other Islamist leaders were executed on fictitious charges," he added.