See post #11 which was in reference to the authors of your source.
No one questions the Mary of the New Testament. What is questioned is what Rome claims about Mary which doesn’t align with the New Testament.
"In reference to" you say?
What heresy specifically, according to whom?
According to schismatic Romanists? All Roman Catholics are schismatics -- not only the sedevacantists among the Romish sort.
Oh!, And Have a Nice Day.