the republicans experienced their own,internal civil war due to the tea party.
now the democratic party is experiencing their own civil war of sorts.
you have an insurgency of small donation,anti-corporate candidates who are successfully challenging entrenched incumbents.
the old,neo-lib corporatists from the bill Clinton era,are actively attempting to squash this insurgency which threatens the status quo.
look what they did to tusli gabbard.
or sanders in 2016.
which they cannot repeat due to sanders having way to much popular support.
what you are talking about are the far left within the party that engage in this weird purity test.
and yeah..it is kinda funny to watch.
because republican party members don't do that.
just look at how so many republicans talked so much trash about trump,but when trump got elected?
they all fell in line.
republicans are much better at politics than the left.
for reals