I think I agree, but I'd phrase it a bit differently. The problem in our country isn't division, it's that there's an energetic fascist movement that needs to be stopped. The problem with assassinating Trump is that it gives that movement a martyr and would very much energize them (disorganize them too, since they wouldn't know for sure who to follow anymore, but they've never needed to be too organized to do damage and they could do plenty before succession fueled infighting really started to take a toll).

Killing Trump won't kill his ideas, the only way to do that is to embarrass Trump and Trumpism badly, so I think the best series of events would be a) Trump loses the election, b) prosecutors explain Trump's many crimes in meticulous detail to a series of juries who sentence Trump to years and years behind bars, c) Trump dies of a heart attack while taking a shit in prison.

The fact that the voters already did a) once in 2020 and the system's let us down on b) is deeply frustrating and worth acknowledging for the sake of identifying the country's underlying problems (it's the politicians and lawyers more than it is the voters), but it doesn't change the fact that assassinating Trump is the last thing we want to do at this point.