Government nationalization of industry isn't usually a good thing, though there are industries like water supply which work better as public utilities.
Things like social security and government funded health care are good, but they also are not "socialist." Welfare state programs are not socialist by definition because socialism is state takeover of industry.
Basically this. A liberal democracy with a robust social safety net isn't socialism. Progressive taxation isn't socialism so long as it respects people's individual rights.
Authoritarian socialism is always bad.