I can't speak for others but, to me, this is about fair and equal treatment -among people in the process of being prosecuted-.
For me, there is no underlying hatred of Islam. If it were any other religion yet still involved the wearing of a veil, I would still have the same problem of one set of people having to show their faces throughout trial and another set of people receiving 'special treatment'.
Differential treatment is how discrimination manifests itself. We can sidestep the racial element by simply discussing how we would feel if it was a white, female, witness-intimidator who insisted on veil-wearing, in this manner and then every other ethnic minority in turn. By rights, the answer would be the same each time.
By the way, one bad thing to come out of all of this is that every scrote out there has suddenly become aware that their facial expressions in court are being 'read' by their jury and will all be practicing their 'poker face' from now on.