Whether The Muslims Need The Mahdi

According to the Prophet, Muslims need the coming of a Mahdi at the end of time to win Islam over all religions. There are many hadith, hadith where the Prophet preach about it, and the Prophet ordered us to follow if the Imam Mahdi Mahdi comes. Cases of people willing to obey or not is another matter. However, too hasty to reject more than 60 Hadith that preach about the coming of the Mahdi only by argument, but there are many messages in the Quran which according to the proclamation of the existence the arrivals of Imam Mahdi

Experience in past periods as where described in the Quran shown in sunnatullah, that every messenger of God who came then people would make fun of him and oppose it vigorously. So whenever the coming of Imam Mahdi or the messenger of Allah, the treatment must also like that,  ridiculed, fun and loudly opposed by his arrival. So once again the question a rises :

What are the signs of the coming of a Mahdi ? Find the answer here