It seems to me that if we are truly one nation of Americans, we as a nation have a collective responsibility to ensure that nobody gets left behind.
Does not follow. There's always going to be winners and losers, even if there are no racial, ethnic, or gender schisms dividing them.
If we are one nation, then the onus is upon every one of us to do all we can to help undermine the barriers that keep a group of Americans, simply through accident of birth, from achieving social parity.
Unfortunately there's a prisoners dilemma here. If one subgroup chooses not to identify with the nation but only with themselves against another subgroup, they gain an advantage. The other subgroup can neutralize this disadvantage only by reacting in kind.
So, given that white men (or more specifically cis-white-hetero-males, though for the purposes of CS Asian males are included as well) are the target of various "social justice" initiatives, and in fact are now suffering for it (note the gender disparity in college admissions), it makes sense for white men to NOT be concerned with boosting the groups who have labeled them the enemy.