Then why do the “Universala Esperanto-Asocio” enjoys consultave relations with both UNESCO and the United Nations? Why is Esperantism described as “democracy”, “education”, “rights”, “emancipation”,… Why do still Esperantists support Esperanto, when it hasn’t got any advantages at all, and they know it?
    The only conclusion possible is that Esperantism (and some other fanatic conlangism) is actually a religion, because it’s based on faith alone: faith on believed “easiness”, on believed “neutrality”, on believed “number of speakers”, without any facts, numbers or studies to support it; on the belief that languages can be “better” and “worse” than others. And it’s obviously nonsense to discuss faith and beliefs, as useless as a discussion about Buddha, Muhammad or Jesus. But, trying to disguise those beliefs as facts helps nobody, not even Esperantism, as it can only attract those very people that see creationism and alternative medicines as real alternatives to raw scientifical knowledge. Esperanto is the god, Zamenhof the messiah and the UEA its church.

Indo-European
source : http://carlosquiles.com/indo-european-language-blog/2008/11/a-simple-faq-about-the-advantages-of-esperanto-and-other-conlangs-easy-neutral-and-number-of-speakers/