Background of PPP (Pakistan peoples party) and Pmln how these parties served Pakistan

Some time i Shock to see that how people supports some political characters so blindly??

Take the example of Pakistan, In Pakistan there are two families who are ruling Pakistan from Decades one is PPP(Pakistan Peoples Party) and 2nd one is Pmln.

now come to the political background of these two parties how these parties evaluate, how these parties come to such stage to rule the country named Pakistan?

Peoples Parties which founded by Late Zulfqar Ali Bhutto a dominant leader in the History of Pakistan and he was part of General Ayub cabinet. and according to PPP supporters he was first political martyr of Pakistan. What Zulfqar Ali Bhutto did to Pakistan when he came to rule, Yes he done a tremendous job by dividing Pakistan into pieces and make another country on world map which is now called as Bangladesh. that was Bhutto first Service to Pakistan because he was already aware that if these both part of Pakistan remain united than it would be difficult to govern. After some period when Zia ul Haq take over over Bhutto Government he Hanged Bhutto in Murder case of father of Ahmed Raza Qasoori now i need answer that is it was service to Pakistan or was punishment of murder?

After Zulfqar Ali Bhutto his Son Mir Murtaza Bhutto arrested in 1993 in terrorism act by order of his own Sister Benazir Bhutto at that time benazir Bhutto was prime minister of Pakistan, and after some period Murtaza released from Jail and contested election from Sindh provisional assembly Murtaza was against the Benazir and Asif Ali Zardari and that's why he was big critic of Benazir and Zardari in this result on 20th September 1996 Murtaza killed in Police encounter along with his 6 friends.

So how this murder give benefit to Pakistan it was truly family war which resulted in death of Murtaza Bhutto.

After this Honor Killing Mohtarma Benazir Bhutto Killed in Target attack in 2007

that attack took place when she was returning from Jalsa in Liaqat Bagh Rawalpindi, and the main benefit of this incident for Pakistan was that Peoples party came in Rule and prices gone high, Target killing started, Loadshedding gone out of control, corruption broke all records, if this was service to country than PPP done it very well.

Now take a look at Pmln background, first of all just make an overview of Great Nawaz Sharif how Nawaz Sharif Became leader a big so called leader, than one thing which is every body knows is Nawaz Sharif was adopted son of Zia Ul Haq who is killer of Zulfqar Ali Bhutto according to PPP Jiyalas. 

Story is Interesting founder of PPP was the part of Ayub Khan cabinet and Founder of Pmln was so called son of Zia ul Haq, both became leaders in military nursery. but when they got full control they start blaming Army and in result Zulfqar Ali Bhutto gifted with Death and Nawaz Sharif was thrown out from country for almost 10 year.  Can any body have the answer that how these parties serve the country or just have to support blindly?????