While I'm no Reagan fan, the AIDS statement seems a bit out of character for him. Reagan was much less conservative than Bush Jr., and while he was widely criticized for not doing enough about AIDS, I don't recall, nor can I google, him making any statements anywhere near the "they that live in sin shall die in sin" statement.
I did find an interesting HBO movie from 10 years ago (that I don't remember) that got the same sort of heat:
http://www.fumento.com/heterodoxy.htm
But I completely agree with you. When people make vitriolic, one-sided, heavy handed, closed minded statements, they tend to stifle discussion and provoke a backlash.
It would be much better if people on all sides of the political debate could discuss things calmly and listen to each other's points.