Most of Danerys' 'allies' should hate each other more than Cersei

[Tianzi]

Well, with the exception of Olenna Tyrell. But the old girl still poisoned Joffrey and threw Tyrion under the bus, which triggered the most of Lannistercide, so she sort of deserved to suffer the consequences of Cersei going bonkers.

But the rest...

The Sand girls are supposed to have a problem with the Lannisters' role in deaths of Oberyn and Elia.

The only Lannister who can be held responsible for Elia is Tywin. OK, it's a secret that a certain Targaryen jerk secretly divorced a certain Dornish princess to marry some other girl and make his son with her a heir (and screw his children with the Dornish princess). But it's not a secret that he abandoned Elia and her children to their fates to run off with Lyanna. If the Sand Snakes believe in family responsibility, they should hate the Targaryen's on par with the Lannisters. Not to mention that they themselves murdered more Martells than them.

If we insist to blame Oberyn's death on something else that his own poor choices, then we should look for Joffrey's murderer. In reality - Olenna. Supposedly - Tyrion. The one whom Oberyn was defending - Tyrion. The one who orchestrated the trial - Tywin (dead, killed by Tyrion). Cersei back would have been completely fine with tearing Tyrion to pieces without any trial. Not to mention - again - that they did more to Cersei's family (and their own) that she did to their until they allied with Daenerys.

Tyrion has his reasons to hate Cersei, but then again - he realizes that Tywin didn't believe his fault in Joff's murder, but Cersei herself (and many of the people more reasonable than her) did, so she just acted accordingly. And when he learns who murdered Joffrey and put him in this situation - well, Olenna again.

And Davos had his son burned alive because of Tyrion, but then I guess he's just being the bigger man.