Will changes in race and ethnic relations change in the next 5 or 10 years be different than the changes in the next 50 or 100 years?
The changes in race and ethnic relations in the shorter term will be much less dramatic than the changes in the longer term will be. This is to be expected with any sort of social change. Dramatic change in the short term is rather rare.
In the short term, there is not likely to be very much change if any. There is simply no reason to believe that anything could happen that would cause changes that would be visible in the space of a single decade. It may be that relationships between whites and Hispanics will improve to a small degree as Republicans push harder to win Hispanic votes. However, it is not likely that the change will be dramatic.
In 50 or 100 years, by contrast, we have time to see very dramatic changes. After all, 100 years ago, lynching was fairly common and 50 years ago racial discrimination was legal. It is at least possible that we will experience just as much change in the next 50 or 100 years. In particular, we might see this change because of the fact that the ethnic makeup of our country is changing so fast.
So, I do not foresee major changes in these relations in the next 5 or 10 years, but I imagine that we will be much closer to racial and ethnic harmony in 50 or 100 years.