Depending upon when the bus co found about this labor action, I don’t see their liability past refunding the charter costs. The drivers, OTOH, should be fired tomorrow. The drivers are entitled to their free speech but they are not thereby allowed to use company assets to express same. Had the drivers drove their buses to the route and blocked the route, that would be essentially the same thing.
Sounds like the antisemite “drivers” committed a “hate crime” to me. The FIB should be all over this like stink on the FIB.
The bus company had a contract to perform. They did not and are liable for damages.