Tetrad's are not rare, I agree....
What is rare are the dates and events of the tetrad's... Only 7 have been on Jewish Holidays in the past 2,000 years... All 7 tetrads on Jewish Holidays occurred during extremely important years. Such as the rebirth of the nation Israel...
What is also rare, is there will not be another tetrad on Jewish Holiday's for another 200 years...
I think chapters like Luke 21 are extremely enlightening on subjects like this... We are not simply saying that the blood moons mean the end times... We are saying all the signs are pointing in the direction, that His return is very soon.
Israel is surrounded by armies...
Egypt and Syria have gone into revolutions (predicted in revelations).
Next will be Turkey (in a more public light then what is now happening).
The constellation virgo will have 12 stars in her head, the sun at her head the moon at her feet. Then Jupiter the King planet will enter what is considered the womb of Virgo for 9 months...
The plausible arrival of planet X...
Global economic crash is likely to happen September 2015...
And Ect....
God said it will be like in Noah's day when He returns... Luke 17....
The scientific community has proclaimed they can now make a Chimera...
Monkey genes altered. to be half man half ape...
Human-Pig hybrid Chimera.
You have the cross breading and genetic modifications of almost every domestic animal used for consumption...
Nearly all our produce is genetically modified.
By no means is anyone saying the moons alone predict that Jesus will return... We are saying all the prophecies are lining up for His return... We watch and wait for His return...
(edit: and I don't think I have to mention how anti-christian the world is...)