SQLSTATE[23000]: Integrity constraint violation: 1451 Cannot delete or update a parent row: a foreign key constraint fails... Laravel 5.3?

Question

JavaScript

Ajax:

$(document).on('click', '#mass_delete', function( ) {
         var values = [];
         var token = $(this).data('token');
         $('input[type="checkbox"]:checked').each(function() {
           if( $.isNumeric( $(this).val() )  ){
             values.push( $(this).val() );
           }
         });
         // alert(values);
         $.ajax({
          url: 'products/mass_delete',
           type: 'delete',
           data: {
             "delete_ids": values,
             "_method": 'DELETE',
             "_token": token,
           },
         })
         .done(function( response ) {
           console.log("Success! Rows deleted.");
         })
         .fail(function() {
           console.log("ERROR!!!");
         })
         $('input[type="checkbox"]:checked').each(function() {
           $(this).parents('tr').remove();
         });
       });

route

Route::delete( 'products/mass_delete', '[email protected]_delete' );

Controller

public function mass_delete(Request $request){
  $product_ids = $request->get('delete_ids');
  if ( is_array( $product_ids ) && !empty( $product_ids ) ) {
    Product::destroy( $product_ids );
  }
}

It seems to me that it does not delete because there are comments on the product, then all the comments on the product must be deleted.