Ariella makes a good point. He is not inviting people, they are drawn there relative to their own needs and interest. Many are seeking a savior who will do miracles and prove the Divine is active in today's uncertain world. Like the old question, 'what does a pickpocket see when he meets a saint?', so too maybe some are able to see the Divine at work, while others need for security in their world view lets them only see a scam.