The circumstances of Cox's departure from his previous employment were such that he would have failed the vetting in order to contest his late wife's seat.
But no, he does not support extremism and terrorism by supporting Hope Not Hate.
He does so by supporting the White Helmets, a major beneficiary of the Jo Cox Memorial Fund.
As for Farage, why is he still on British television? He is the former Leader of what will soon be a former political party.
On last week's Question Time, two of the five panellists were based in New York. One was Louise Mensch. The other was Nigel Farage.