Wrong, you can have been nice at him, taken every moral choice and allowed him to have his vengeance at Loghain, yet if you decide you want to stop the Blight and live without killing him either, he will say that you are an immoral bastard at your back, do you call that a friend? I do not.
I'm not exactly certain what you mean here. Are you saying that if you decline to kill Loghain in Origins Alistair is unhappy? Because that's always the same. He
vehemently believes that Loghain deserves to die. No exceptions.
In DAI Alistair is still likely friendly towards the HoF unless otherwise made to be.
Just because cancer can be possibly cured you don't pick a person sick of it over a perfectly healthy one, so my point still stands.
All I said was that it wasn't
necessarily true that they will be "sick" within the near future. I didn't say you were wrong about your choice, just that they could
potentially be cured.
And anyway, Alistair and Loghain would have more time left than Stroud. At this point Alistair and Loghain have only been Wardens for a little over 10 years -- most Wardens live on average of around 30 years after the Joining, sometimes even longer than that, as Alistair says back in Origins.