For many years there was a pattern of immigration from Mexico in which all immigrating from a particular place, locale, town, etc in Mexico would end up in the same place. And this was consistant thru time. If the immigrants from a particular valley in Mexico had ties in Texas, those coming from a different place might have ties in SoCal. These differing groups would have different backgrounds and attitudes. Mexicans are not one large homogeneous group. Its as if Mexicans in Texas would be contemptous of California and the Mexicans that went there.
Also consider when TX and CA shifted from being rural to urban and when large numbers of people from other parts of the US arrived in each of these states. Some how I think that this has some bearing on it.
So you think state governments should give full benefits to illegal aliens?
BTW, Pete Wilson was a political success. Both he and proposition 187 won by a landslide in 1994. And he got about the same % of the California hispanic vote as did Bush.
Wilson got 25% (source). Bush only got 22% (source) .
These exit poll results have margins of error bigger than 3%, so statsitically Wilson's and Bush's showings are about the same. However, the point still stands: the notion that Wilson alienated California hispanic voters and that Bush is winning the back is pure myth.