May Allah reward you, is insulting the companions and especially (Abu Bakr) the truthful and Umar, may Allah be pleased with them all, is disbelief ?
Insult the companions or any of them is disbelief and hypocrisy. Only an hypocrite and a disbeliever can hate them. It is not permissible to hate them. The Prophet (صلى الله عليه وعلى آله وسلم) said :