Yes there were lots of things going on during that time, it was a different era and racism was much more overt than it is today across the globe. Having said all that what would be the aim of the California state assembly now? Just an apology and move forward or do you think there is another deeper agenda for making the apology now? (I use the word agenda with neither positive or negative connotations).
Looking into it further, I think you are right on some points and so am I.
The approximate 1/3 of the group who were actually Japanese citizens - I do not see what could have been done with them except intern them.
For the others, it does appear CA had state - level racist policies.
https://en.wikipedia.org/wiki/Internment_of_Japanese_AmericansOf 127,000 Japanese Americans living in the continental United States at the time of the Pearl Harbor attack, 112,000 resided on the West Coast.[9] About 80,000 were Nisei (literal translation: "second generation"; American-born Japanese with U.S. citizenship) and Sansei ("third generation"; the children of Nisei). The rest were Issei ("first generation") immigrants born in Japan who were ineligible for U.S. citizenship under U.S. law.[10]
Japanese Americans were incarcerated based on local population concentrations and regional politics. More than 112,000 Japanese Americans living on the West Coast were forced into interior camps. However, in Hawaii, where 150,000-plus Japanese Americans composed over one-third of the population, only 1,200 to 1,800 were also interned.[11] The internment is considered to have resulted more from racism than from any security risk posed by Japanese Americans.[12][13] California defined anyone with 1/16th or more Japanese lineage as sufficient to be interned.[14] Colonel Karl Bendetsen, the architect behind the program, went so far as saying anyone with "one drop of Japanese blood" qualified.[15]