Are Democratic voters going to be cause of a victory for McCain?

All this childness from Democratic voters are some of the reasons why myself and others choose to be Republicans. How immature of voters to say there not going to vote for the other when they agree on 95% of the issues because their candidate doesn't get chosen. Fighting like children, each of your candidates are creating a rift in your party by encouraging die-hard supporters instead of promoting the ideals and importance of the Democratic Party and a Democratic president. They don't care about that, they just want to win.