I've seen that quote a few times, albeit in differing forms. It isn't Churchill.
"Show me a young Conservative and I'll show you someone with no heart. Show me an old Liberal and I'll show you someone with no brains."
Often attributed to Winston Churchill. The phrase originated with Francois Guisot (1787-1874): "Not to be a republican at twenty is proof of want of heart; to be one at thirty is proof of want of head." It was revived by French Premier Georges Clemenceau (1841-1929): "Not to be a socialist at twenty is proof of want of heart; to be one at thirty is proof of want of head."
http://en.wikiquote.org/wiki/List_of_misquotations
"Show me a young Conservative and I'll show you someone with no heart. Show me an old Liberal and I'll show you someone with no brains."
Often attributed to Winston Churchill. The phrase originated with Francois Guisot (1787-1874): "Not to be a republican at twenty is proof of want of heart; to be one at thirty is proof of want of head." It was revived by French Premier Georges Clemenceau (1841-1929): "Not to be a socialist at twenty is proof of want of heart; to be one at thirty is proof of want of head."
http://en.wikiquote.org/wiki/List_of_misquotations
Every normal man must be tempted, at times, to spit upon his hands, hoist the black flag, and begin slitting throats. - H L Mencken