So what you're saying is that you have nothing? Not a single solitary fact, that you can point to that might indicate his possible left-leaning stance. Just on the face of it, over 70% of political violence in the United States comes from right-wing sources, less than 10% from left. By those numbers alone, it's a fairly safe assumption he probably wasn't at leftist.
Those currently in power are actively trying to frame it as a leftist to justify current and future abuses of innocent people.There's nothing wrong with pushing such a well-founded assumption as the likely truth. in the face of their propaganda. But refusing to push back against unfounded accusations against those who would be our allies. Shows that you are not likely their ally.
But, you know what? I take it all back. Your complete and utter lack of anything at all to point to has convinced me.