Such sites and channels promote sectarianism and have no basis. All of their points have been answered strongly and refuted by our ulema in thousands of books.
The best way is academic calm discussion based on evidence. Giving attention to these sites only supplies them with the oxygen they’re desperate to get for publicity. Channels and sites are many which attach shiasm. We have to provide alternative sites where the beautiful message of Ahlulbayt is presented with wisdom and intellect