Blowing up other people for not sharing your outlook, however, is.
As long as these people were burning clothes they had purchased, or legally acquired, and were following local codes on open burning, they weren't doing anything wrong.
Actually they beat up women who don't sit on the back of the bus and throw bleach on women who wear immodest dress and stone the windshields of people who drive on the sabbath in their neighborhoods. Does that qualify as wrong?