Hillary Clinton has accumulated the knowledge and skills over the years to qualify her for the job.  Jill Stein has not.  Furthermore, if she indeed holds the consensus position that vaccination is necessary to prevent epidemic disease and is safe for all but a tiny number of identifiable children, yet she will not take a stand to that effect, then she is dishonest, and she is dishonest about a major issue that affects the lives of many.

You say I lack courage?  To heck with you.  If you represent the average Green voter, I don't need you, and I don't want you choosing the leader of MY country.  Got that?  Disagreement is fine.  Characterizing me as a coward is not.  That's something your parents should have taught you.