Jack the Ripper: Latest theory claims the serial killer was a singer protected by Freemasons

Oh dear. Not that old chestnut again. More "subjective validation" and "spurious correlations".

I would refer the (un)learned gentleman to the first page of the book of constitutions:

Summary of the
ANTIENT CHARGES AND REGULATIONS
to be read by the Secretary (or acting Secretary),
to the MASTER ELECT, prior to his
Installation into the Chair of a Lodge
1. You agree to be a good Man and true, and strictly to obey the moral law.
2. You are to be a peaceable Subject, and cheerfully to conform to the laws of the country in which you reside.
3. You promise not to be concerned in plots or Conspiracies against Government, but patiently to submit to the decisions of the Supreme Legislature.
4. You agree to pay a proper respect to the Civil Magistrate, to work diligently, live creditably, and act honourably by all Men.

This book is available from any masonic store. It is in the public domain.

Also the third degree actually states:

"My breast shall be the scared repository of all his lawful secrets as my own when entrusted to me as such. Murder, treason, felony and all other crimes contrary to the Laws of God or the ordinances of the realm being at all times most especially excepted...."

Unfortunately these "little pieces" of information are (conveniently) omitted from this narrative (otherwise the story would not make any sense as a conspiracy). 

http://www.ibtimes.co.uk/jack-ripper-latest-theory-claims-serial-killer-was-singer-protected-by-freemasons-1522303