Remove Facebook group members

1. Go to group
2. Members tab
3. Paste this script that manually clicks on items and does the job for you

setInterval(function() {
 if (document.querySelector('[role="button"][action="cancel"]')) {
  document.querySelector('[role="button"][action="cancel"]').click()
 }
 if(document.querySelector('button.layerConfirm')) {
  document.querySelector('button.layerConfirm').click()
 } else {
  document.querySelector('[aria-label="Member Settings"]').click()
  setTimeout(function() {
   if (document.querySelector('.uiContextualLayerPositioner.uiLayer:not(.hidden_elem) [data-testid="leave_group"]').textContent.toLocaleLowerCase() == "remove from group") {
    document.querySelector('.uiContextualLayerPositioner.uiLayer:not(.hidden_elem) [data-testid="leave_group"]').click()
       setTimeout(function() {
           document.querySelectorAll('[role="dialog"] input[type="checkbox"]').forEach(function(el) {el.click()})
           document.querySelector('button.layerConfirm').click()
       }, 1000)
   } else {
    document.querySelector('[data-name="GroupProfileGridItem"]').remove()
   }
   
  }, 500)
 } 
}, 3000)

Pro tip: Run in multiple tabs to speed up deletion.