I was at a house party once here in Australia, and a Canadian friend got frustrated at me. "It sounds like you believe in policy X, but also policy Y! I don't get it! What are you, left or right?". And I responded by asking what policies X and Y have to do with each other at all? Why should your stance on war and fracking be correlated? Or have anything to do with your opinion about gun control, abortion rights, racism or free speech?
I'm not convinced "actual leftism" has any well accepted meaning. Liberalism has a clear meaning. But "leftism" / "rightism"? They both seem like kinda arbitrary grab bags of policy ideas to me. Why not a pro-war & pro-fracking democrat?