obviously one has to be smart to lie. They couldnt have concocted too many lies for Abu Bakr, Umar, and Uthman for what great thing did they do for Islam during the life of the Prophet anyway? History testifies to them being disobidient to the Prophet, fleeing battles, doubting his Prophethood and what not.
Many hadiths on the name of Jabir b Abdullah, Abdullah Ibn Abbas are nothing but fabrication.
why there are numerous false hadith in praise of muawiyah ...what did he do to help islam.
or many other sahaba did so much to help islam yet very littl of their lives /merits are recorded or remembered.
and the criticism of the first 3 sunni caiphs is also found in sunni sources and hadith wherever appropriate that atleast to neutral observer is some proof of objectivity.Again which history ? 12er or sunni ? the same histories have also recorded the merits of these men but u choose to ignore them as it does not fit 12er aganda
re: ibn abbas and others , same argument can be used against many 12er hadith going back to jafar sadiq and baqir , as most 12ers in their isnads are rejected by sunni muhadiths as liars.
secondly even if we assume ur allegation is true , the mere fact that these hadith were attributed to them shows that these important partisans of ali were stamps of authenticity even in sunni hadith circles.