Biden will face many other eager Democrats in the primary election. Various potential contenders are more aligned with the ideals of the Justice Democrats. Candidates such as Kirsten Gillibrand, Bernie Sanders, Elizabeth Warren, and others have supported Medicare-for-All, abolishing ICE and even looking into slavery reparations.
While many Americans view a lot of what progressives stand for as radical or extreme, this appears to be what Justice Democrats are hoping for in the Democrat nominee.