The Left hates America as founded, and they trash it constantly now! Their idealism would be something much more in the image of Satan than the image of God! Other than that, they are nice, well-intentioned people. IMOP
Ironically, in my opinion, the left has a case against some, even much, of how America was founded. For me the issue concerns the evils that are necessary to have freedom in Satan's world, i.e., our founding principles, versus what for me is a wrong-headed desire and a belief that the world could be other than it is (irreparably broken) if people quit thinking it's irreparably broken.
I, and I suspect our founding fathers, believe the world is irreparably broken, so that we have to function in some very broken ways just to have freedom and a modicum of prosperity in the devil's world.
Where I agree with the left is when the right, and particularly orthodox Jews and Christian, assume that the evils necessary to live in an acceptable, free, prosperous manner, are not evils at all, but the good that fixes the world rather than merely enduring it. For me conservative principles, say monogamy, suck. But the alternative is worse.
The left seek a more perfect world that I believe can't come about without Christ. I wouldn't fault them for seeking a more perfect world. I would fault them for what I consider a misplaced belief it's achievable without Christ.
Some on the right believe the evils necessary to survive and thrive in this hell-hole (monogamy, the nuclear family, strict gender roles, etc.) are not necessary evils at all, but God's great plan from the get-go. I would fight this erroneous belief hand-in-hand with the left. For me the Church is causing some of the division by its historical preaching that certain necessary evils (some noted above) are "good" even "righteous," rather than necessary in a demon-haunted world.
Ironically, the foregoing implies the left have good intentions but a misunderstanding of the situation, whereas the right turn divine provision for life in a prison into the provisions for righteous living. I believe there's a case that the latter is undeniably less forgivable than the former.
John