Can someone summarise the whole Paki-Afghan relationship? Are Pakis enemies?

[Valujira]

Evening,

What is the attitude of Pashtuns towards Pakistan? I know that the Durand line is a strong reason for confrontations and constant clashes between Afghans and Pakistanis, but what's the deal with Pakistan and Afghanistan? Like, I can see sometimes on youtube that a lot of Afghans are proud Pakis and vice versa...

Also, Pathan=Pukhtu?

Thanks and loy pukhtunistan

Alex