Re: Doubt
I’d expect this doubt to be Umar RadiAllahu anhu having doubts about himself, not about the actual truth
So I think you are wrong to say that, although I have no idea what kind of texts you are implying/concluding from
There is a hadith I have heard where some Sahabis came to the Messenger of Allaah SallAllaahi Alaihi wa alihi wa sallam and said ‘we have thoughts that we can not speak’ and the Messenger of Allaah SallAllaahu Alaihi wa alihi wa sallam said that was a sign of faith. The understanding of the hadith is that hating them thoughts is a sign of faith