Utter nonsense. Those "fringes" are now mainstream on the left, and questioning them will get you excommunicated and your life ruined. If there are leftists who don't hold those opinions, then they are being awfully quiet about them to avoid cancellation. Infinity migrants, encouraging crime, the troon cult and anti white rhetoric are not sensible positions, yet they are unquestionble in leftist politics. These positions are more out there than radical leftists were in the 1990s, because while some held one or two of these opinions, very few of them held all of them at once, with full conviction. Today, they are the basic policy positions of the DNC.
There is no way for normal people to come together with fanatics like that, because woke ideology is innately hostile to normal people. Divisions are good when it involves separating from people who want to destroy your family and way of life. The only way out is to win decisively, and impose severe consequences on the left.