the land is being developed, and crime was getting out of control. and they only had to move three blocks to a different one, supplied by the city. to cite the very article you posted:

There were more than 100 emergency calls for drug use, sex acts, theft, vandalism and unresponsive people in and around the camp. A number of neighboring American Indian nonprofit organizations urged the city to close it.

it’s a little more nuanced than mean people kicking out poor defenseless citizens.