Are there any Christian denominations or specific churches that incorporate Odinism or Odinistic cultural traditions? 

Perhaps, as a way to show that the original religion of northern Europe was not to be destroyed but reveled through Christ?

For example, Odinists state:


  The calendar in use by Odinists in this country today is based on some
  of the festivals most widely celebrated by our ancestors, especially
  those which have survived as part of our people's folklore. Many
  church festivals have incorporated elements of heathen customs; and it
  is now our task to 're-paganise' them.


http://www.odinistfellowship.co.uk/


Question: What creates this strange flare and how to prevent it?
Answer: If you're talking about the strange arcs like in the bottom left corner of this picture:



Then it's just flare caused by shooting into a lightsource. Concert lights tend to produce strong flaring effects as they are very focussed.

The only fix is to use a different lens (they all flare differently) or not shoot directly into any lightsources. However when I'm shooting concerts I usually shoot directly into the lights on purpose and use any flare as an artistic tool to make the image more interesting.

Here's another image featuring some particularly strange flare from the Canon 50 f/1.8: