The stolen and destroyed property is tents. Notice there were no drug arrests and no claims that the tents were confiscated as fruits of the drug trade. What was claimed was, they did it to get rid of the homeless men.
OK, that being what you say it is, but I think the city has a right to confiscate any structure/material that is deemed to be a hazard to the community. In that these folks were smoking and cooking (by fire) within these tents, and the Fire marshall advised them to vacate for safety reasons, then I think it is NOT unreasonable to come in and destroy those structures. Municipalities condemn and knock down homes all the time. Why would one think this is different?