I believe that the minority of white folks who still vote Democrat after and during the Obama era racial demagoguery are likely doing so because of social liberalism
There are also people like me who are tired of the Republican hypocrisy of being always in favor of tax cuts while never putting forward real proposals for cutting programs. They may be in favor of starving programs so they can be "examples" of government inefficiency, but rarely do they take the politically unpopular step of calling for outright elimination unless there is zero chance they would succeed.
I just don't trust Republicans to be fiscally responsible.