The left is (traditionally) pretty splintered.
Far out in the very "left" (hard to still call it that) spectrum are the #Anarchists who see themself as not aligned with traditional politics.
Then comes the #CriticalLeft which is the least antisemitic sub-scene, because they critizize all & everything including themself. That helps somewhat.
Next #OrganizedLeft (unions & stuff).
Followed by #BourgeoisLeft.
And on the far right is the #AuthoritarianLeft (who see themself as being far left).