Do you believe in evil spirits?

Recently, my son and his boyfriend bought a ouija board from a gypsy at the weekend markets. I'm told they used some sort of incantation and ritual from a book they got from the same vendor to supposedly summon the ghost of Adolf Hitler.

It sounds crazy but ever since, weird shit has been happening in the house. First, there was a car load of white supremacists flying among others a Nazi flag while recklessly driving down our quiet street. This never happens. Those people are very our of place in this neighborhood. Then, my wife found an old radio and thought she would hook it up to listen to the show she used to listen to while driving to work. She works from home now, so she doesn't have the chance. When she hooked it up, old 1940s war music was playing!

But the worst and most disturbing occurance happened just this morning when my father in law who is Jewish came to stay with us. I could smell gas and went down stairs. My father in law was there in the kitchen drinking a coffee and the gas stove was on! I turned if off immediately.

Could this be the actual ghost of Hitler doing this to us? Is there a real life Ed Warren type person I can get in touch with to cleanse the house?
Do you believe in evil spirits?
Updates
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Additional occurrences since the initial event:

I threw out the ouija board.

When I got home from work alone because my wife was out at a friends baptism, I turned on the TV and there was a documentary on about Hitler!

I changed the channel once and it was a show about an antique dealer who was appraising an old SS uniform hat with the skull on it! I changed a second time and it was an advertisement for the Bundesliga which is the German soccer league!
Updates
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So I changed it a third time and this one really sent chills down my spine. It was an ad for Fawlty Towers with John Cleese holding his finger to his lip imitating a Hitler mustache!
Do you believe in evil spirits?
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