Buses are actually the safest form of road transport.
Yeah, but not because they are inherently safe, but because they are often driving much slower than regular traffic and in stop and go situations, often in places built around bus infrastructure.
Put them on high-speed roads or outside that tailored infrastructure, and you end up with multi-casualty crashes. Like this, or this, or this, or this.
But to the comment you were replying to, many of the bus drivers around here drive as though they were in a pickup truck. Poorly!