It was the wealth destruction brought on by politicians during Covid
"The COVID-19 pandemic, and associated economic downturn, housing shortages and housing price inflation, outpacing wage growth, and the end of government protections and assistance to counter the economic effects of COVID-19 -- along with the explosive growth in addictions to methamphetamine, opioids, and Fentanyl -- contributed to a sharp rise in homelessness in the early 2020s.
By 2023, according to the federal survey, a record 653,104 homeless were identified in the annual federal survey -- a 12% jump over the previous year, quadruple any other year's increase, with increases in every category and demographic of homelessness."
https://en.wikipedia.org/wiki/Homelessness_in_the_United_States#:~:text=The main contributor to homelessness,a role in explaining homelessness.
The homeless are not immigrants, and they are not caused by immigrants, they were caused by local politicians ruining people with their Covid policies.