AFAIK, small businesses are not harmed much and the targets are government buildings and such.

And even if they were, insurance will clear it. And even if not, honestly, the only ones who suffer are the business owners, and I have little sympathy for them—small mom'n'pop ops can't afford renting premises in downtowns, anyway; shops in these locations are luxury boutiques. Nothing of value is lost if a business selling designer handbags or overpriced cuisine ceases to exist.