default per group views do not work.

foreach ($groups as $group) {
you expose a new view, but there is no code at all to filter by group that view, so it basically doesn't work at all.

I added this to the view filters:

    $terms = taxonomy_get_term_by_name($group);
    $term = $terms[0];
    $view->filter = array(
      array (
        'tablename' => 'term_node_1',
        'field' => 'tid',
        'operator' => 'AND',
        'options' => '',
        'value' => array (
          0 => $term->tid,
        ),
      ),
    );

and now it works, but I don't know if "term_node_1" is the correct string in every deployment.