Obviously you haven't been keeping up with the recent trends. Bush won 43% of the latino vote, at that time, the latino vote made up less than 10% of the total electorate. 2008 McCain won 33% of the total latino vote, which made up close to 13% of the total electorate, and Romney won around 28% of the latino vote, which made up over 15% of the total electorate.
That's an increase of 50% for latino turnout relative to the rest of the electorate, and when you look at the sharp drop off in % of Latinos voting for R's, then that is a huge red flag. I spoke about this at length, well before you ever came to this board. I warned the immigration hardliners on this board well before the election, and they didn't want to accept that reality. Well, it happened.
Reality is that latinos are going to make up close to a quarter of the electorate within 15 years. Considering not just the growing latino electorate, but the trends for who they've been voting for (The D's), and you couple that with blacks who uniformly vote for D's, you better look to adopt policies, or at the very least become a more inclusive party or the math will catch up, which it already has begun.
So yes, demographics do matter and anyone who denies this is denying reality.