No, it's not. It's the opposite of disingenuous. It is what you are saying when you claim there is little to no distinction between Trump and Obama or Biden or Clinton or whatever middle of the road democrat Glenn Greenwald and that youtube comedian are telling you to hate this week. Trump is miles apart from all of those people on white nationalism, voting rights, the environment, judicial nominations, separation of powers, treatment of refugees and asylum-seekers, and on and on and on. The differences are massive and well-documented, with support found not just in their rhetoric but also in their actions as legislators and members of the executive branch and even in the private sector. Any reasonable person on either side of the aisle who has even a passing familiarity with these people and where they stand and what they have done on various issues will acknowledge this.
So when you say that you don't see much different between Trump and these people, or care much about those substantial differences, that is EXACTLY what you are saying. The conclusion is inescapable. Your reasons for not caring about those differences is a different discussion, and I'm happy to have that one if you want. But not if you're gonna refuse to acknowledge this simple and inescapable fact: when two people are very different on Issue A, and you say you don't see or care about the difference between the two people, you are by extension saying that you don't know or care about Issue A.
If you can't acknowledge that, then nothing else you say matters because you're refusing to accept the basic rules of logic and reason and language.