Billy Wright was very evil. So were, and are, his murderers. And so were, and are, the people who manifestly facilitated that murder.
Not to say, the people who directed it. Who would want to remove an obstacle to a 32-County Irish Republic inside NATO and the EU? Although he does not deserve to be in such company, to the list made up of Lord Mountbatten, Airey Neave (another INLA job) and Robert Bradford, may we not add the name of Billy Wright?
No state collusion? That depends which state, or States, you mean.