History--> Bhutto: Political family conspiracy

The Bhutto's family tragedy really caught my attention right after the bomb incident that killed Benazir Bhutto; the daughter of Pakistan former President, Zulfikar Ali Bhutto. The fact that her father, Zulfikar Ali Bhutto, was executed in 1979 and her brother, Shahnawaz Bhutto, was found dead in 1985 seems to complete the entire family "cursed". Bhutto's family was known to be the political family in Pakistan, so could this be part of the political game they play in Pakistan? Because as far as i know, there are no Bhutto left in the family tree to take over the political field.