Coming from Limoges, things fell apart badly mainly due to police actions :
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a group went apart tried to go and block the highway
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the police decided to tear gas everyone, including the peacedul protest with families, babies and elderly persons
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people where told by the police to stand back and to go to townhall neighborhood
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building was unprotected, though it's usually is in case of protests
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despite a few plainclothes police officers, no action were taken when first fires started
Not to be a conspiracy theorist, but everywhere in France things were so badly handled by the gov and police that it look almost intentional.