They're not going to come out and say that Trump supports the Klan. They're going to show his first tepid denial and then later qualifications on why he didn't disavow it on the spot. And let people draw their own conclusions.
Don't discount this. It will show up in Democrat talking points in the fall. They'd be nuts if it didn't.
And what would those conclusions be? That he supports the Klan? I agree that they will try to use it. But it will only sway shallow thinkers. Come to think of it, there may be too many of those, so maybe you're right. No more to say on this.