set fire to

verb3

1. •
   To cause (something) to be on fire; to set (something) alight.

   • They set fire to the house.
2. •
   (figurative) To stir up intense emotion or action in (something).

   • All it took was one word to set fire to the crowd.
3. •
   (figurative) To destroy or dismantle (something).

   • As soon as the new CEO arrived, he started setting fire to the old way of doing things.