Also keep this fact in mind that Bani Umeya and Bani Abbas were in power for quite sometime, so Islamic history is what they've made of it. People do a lot to stay in power and keep the opposition low and out. So you won't find reliable information about many that these two (Umeyads and Abbasids) didn't get along with.
Quite a few Shia states were also in power for some time, in the time of bani Buwayh for instance the Imami Shia were on top of the world in terms of support from the state, then the Fatimi state, then the `Ubaydi state and the Shia who ruled Yaman and the Safiwiyyah to list some.
As for bani Umayyah "distorting history" you've done them injustice, rather if one reads history books he'd think banu Hashim were in charge of writing history as it only favors them and makes bani Umayyah look like evil tyrants all the time. Heck even banu al-`Abbas's leaders are not favored by the history books like Banu Hashim.
This isn't a matter of political history however, this is a matter of Hadith and the identity of a certain individual, was he a Sahabi or not? So please don't dive into your usual nonsense conspiracy theories and waste our time.
If you have evidence for his companionship, bring it forward, if not then not.
I've done Bani Umeya unjustice??? LOL! How they governed and what they did is right infront of you. The war of Safeen and the damage they caused, how someone like Yazeed was named and appointed as a succuessor, how the members of Ahlul Baith along with certain companions were oppressed, the list is endless.
As for Hadiths, well you clearly know that the Ummah was kept away from this treasure right from the very first Khalif.
Hadiths have clearly been altered and tampered with. And some are strong and some are weak, some are true and some are false.
Brother as far as wasting time is concerned, we do not waste peoples time with double standards like some. We are very clear in our faith and belief and also in our thought, opinion and point of view.
We do not yapp on about the Sahaba and then it's only a handful that we are interested in. Sahabiath for some just evolves around khilafath or Khulafa and that is it.
We never here a single word about Ammar, Salman, Abu Zarr, Miqdad, Habib etc and many more, from these protectors and defenders of Sahaba and Sahabiath.
The first Khalif is very important, his daughter is very imporatnt but when it comes to his son (Muhammad ibne Abu Bakar) then not a single word. Why?