First of all, those who'd want you to believe that an evil 'Zionist lobby under Jews' hates muslims and is responsible for everything are enemies of Pakistan. These are entities that want to deteriorate Pak-US relations at the expense of both countries.
As to your second claim, the US DID return the money for the F16s. This was done in 1998, when $326 million of the $700 million was returned in cash, and $160 million was returned in wheat. Approx $150 million had been returned earlier.
As you see, your first claim of an evil Zionist lobby has virtually seen no evidence surface anywhere. The US always acts in its own interests, not of 'lobbies'. A recent example is the unrest in Venezuela, which is similar to the problems in Cuba during the Missile Crisis.
Your second claim stands refuted as the US did pay Pakistan back, and Pakistan made two choices which resulted in the F16s not being delivered. These are:
-Listening to the Pentagon instead of studying US non-proliferation law.
-Knowing fully well that the US would take negative action against Pak for nuclear weapons, but
deciding that the risk was worth it (and it was) to counter India getting the weapons.
The US still needs to re-think the whole Palestine problem. Israel uses military force and international influence way too disproportionately, and innocent people often suffer as a result. People in Pak are well within their right to believe that the US is hypocritical w.r.t human rights when they see images/videos of Palestinians dying.