I agree with you. The Kool-Aid drinkers for Trump are CRAZY... they have absolutely drunk the poison and refuse to acknowledge he is in any way problematic.
By the looks of this thread, you've got it reversed.
You've been told that Trump said he didn't know who David Duke is and would look into it. Then, after he found out who David Duke is, he disavowed the (fake?) endorsement.
I think the anti-Trump posters want it to be a different way so you keep misrepresenting the facts.