Brandstiftung Anglais:

Macierewicz’s incendiary language may concern diplomats in Brussels already wary about the victory of the nationalist and Eurosceptic Law and Justice.

an incendiary bomb/device

The fire that broke out last night was judged to be caused by arson.

In Germany today, anti-violence rallies took place in several cities, including one near Hamburg where three Turks were killed in an arson attack on Monday.