He didn't pay for a ticket. Tried to get in for free. Because, you know, Germany obviously owes him all kinds of free stuff. That triggered sudden jihad syndrome.
One change over the past decade now in Germany is that most fests will run a music tent, and there will be some charge (usually not more than ten euro unless this is a big name attraction).
From what I hear on German news...there was at least one big name singer at the fest, and couple three-star folks....so I’d take a guess that it was minimum of twenty Euro at the door. If you are immigrant not working....you won’t have that kind of pocket money to throw at some costly ticket.
Strike that last sentence in my previous comment - he had already brought the bomb with him. Was supposed to be deported to Bulgaria soon...guess he didn't want to go there.