Catholic nuns and Jewish peaceniks are operating heavy equipment

It doesn't have any control

Drawing Caterpillar Out Of Its Corporate Cocoon: Company Should Examine Its Role in Mideast Violence

An alliance of Catholic nuns and Jewish peace activists teamed up to introduce a shareholder resolution asking Caterpillar, Inc. to conduct an internal investigation to determine if the use of their bulldozers to violate human rights laws goes against corporate policies.

Bulldozers and heavy equipment are just as necessary and useful to build the houses you inhabit in the first place as to demolish them.