"Youths" is a frequent establishment media euphemism for Muslims. If they were in Britain, they'd be "Asians."
This is indeed a military operation. It is part of the jihad to bring down the Swedish state and replace it with an Islamic government.
"'Like a Military Operation': 100 Cars Burnt in Swedish 'No-Go Zones,'" by Liam Deacon, Breitbart, August 14, 2018:
A gang of masked "youths" rampaged through Sweden's second-largest city Monday night, setting cars ablaze in an attack described as "extremely organised" and like a military operation by the Prime Minister.
Shocking video of fire engulfing numerous vehicles in Gothenburg spread on social media Monday evening with other footage clearly showing masked people in dark clothing intentionally lighting the blazes.
Police chose not to arrest the "young people" at the scene and have since contacted their parents, reports state.
Officers said Tuesday that up to 100 cars had been either burnt to or vandalized in the city and in nearby towns such as Trollhattan, an industrial area with high unemployment, and Falkenberg.
Such areas, with large migrant populations, have become hotspots for violence in the Nordic nation in recent years with many described as "no-go zones."
Fires were also reported on a smaller scale in Malmo, Sweden's third largest city.