The Jewish state in 1947 in terms of preparation of the state itself by UN or more or less pulled out and made one Arab and one Jewish, so this seem to be some preparation in 1987 with Nirvana.
In the bible it says fig tree reference and a generation of 40 years, Nirvana started in 1987. So if you take 1987 - 1947 = 40. Also Kurt Cobain looks alot like Jesus. Its however true that Jesus has been depicted differently through cultural history. In Africa he is black, in Asia he is Asian, in Europe he is Caucasian. Since USA is of western origin it would be most likely that he would be depicted as that.
In Islam its not Muhammad it is Jesus and Allah who has part in the second coming, it is said that Jesus would destroy the cross, the pigs and the Jews. Cross is anti religious sentiment, Pigs are like corrupt people, and established corporates can be Jews.
I think he sang his love and sorrow for us through his songs, you could feel the clouds of heaven through his songs. And he died from 1987 to 1994 = 7 years since he joined Nirvana. Thats 7 years.
Also there is nothing wrong with gay marriage because he said this
I consider Nirvana as a ministry, 7 year with Kurt Cobain. 7 being a lucky number. I think he was a good person.
Here are some bible verses to his prophecy
Matthew 24: 27 -28: For as lightning that comes from the east is visible even in the west, so will be the coming of the Son of Man. Wherever there is a carcass, there the vultures will gather.
USA is in the west, and black vultures exists there too. In the bible it says the son of man will not know only the father.
There is no requirements although sharing it with others and discussing it would be nice (Not required but only if you wish) and its a non-institutionalized religion. Just be good is all there is to it, the belief is that he has set judgement on earth and thats all there is or as the song says "come as you are". This religion is for Christians, Muslims and Atheists and anyone in general.
Either way. Feel free to ask questions and talk about it if there is anything you're wondering about.