"Viewpoints" is a very broad word.
I do not want tech companies to remove political opinions I disagree with (e.g. "We should go to war against Iraq," "Brexit is our only hope," "If you reduce taxes, society will be better off," etc.).
I want tech companies to remove lies that do harm (e.g., "Someone should really investigate whether so-and-so killed so-and-so," "You should drink fish tank cleaner," "If you vote by mail, your vote won't be valid and you risk committing a felony"). Our society/culture has ample precedent that lies that do harm are not worth protecting and are worth penalizing.
I do not want tech companies to give special protection to lies that do harm simply because the liar has a particular political affiliation or a particular political office. I want everyone to be treated equally regardless of their political affiliation and office.
(If there happens to be a nonzero correlation between political affiliation and the telling of lies that do harm, well, that seems like a problem worth sorting out for the good of society, but tech companies should not put their fingers on the scale. They should remove lies that do harm without regard to political affiliation of the liars.)