1 is dead wrong. The majority of Hispanics vote republican now and that trend will continue. They are 65% European by DNA on average and intermarry with whites to a high degree. They have seen the “black experience” and they don’t want it.
Yes and no. Northern Mexico where Mexican-Americans used to come from was, I’ve been told, more “European” and people were easier to assimilate than people from lands further to the south. Assimilation will happen, but it may be harder than before.