For years Trumpers have been hanging confrontational flags and banners at this overpass. Adding a Nazi flag was a superb way for them to get in the news.
https://www.sfgate.com/bayarea/article/nazi-flag-bay-area-hate-crime-20238394.php
Nazi flag found on Bay Area freeway overpass leads to hate crime probe
A swastika flag was found hanging above a Highway 101…
SFGATE