I am not sure why you keep deferring to the PPP, they are long gone and the afc/apnu is now in power. Let us not justify their actions because the PPP may have had similar records of cronyism. They were supposed to be the party of change and anti corruption. However we see that it is very well alive and well in this new breed of crooks.
Well you claim that they were better diplomats so letting you know what kind of diplomacy they engaged in is instructive to you.
You do NOT cave into a bully, unless you want to the bully to continue to bully you. You find allies stronger than the bully, which is what Granger did. Maduro then removed his soldiers from the border, when during PPP rule when ever they got bored they came over, beat up Guyanese, raped one or two, and destroyed their property.
Jagdeo then ran in his corner to hide and did NOT demand an apology or compensation. That is your idea of appropriate diplomacy!