Begging people to understand the severity of the threat Trump and his followers pose is a "loser defeatist attitude"? If you genuinely think that anyone still supporting him is going to come out of watching this man on TV thinking less of him, or seeing it as a serious matter instead of some kind of political assassination of their dear leader, then you've not been paying attention for years.
How many times have liberals been convinced "surely, this will be the end of him!" only for it to galvanize his base and further cement him as their figurehead? Stop thinking that his base has an even remotely similar worldview to yourself, you could show them all the evidence in the world of his wrongdoing and they will still find a way to pretend it's not true. This is what I am trying to get people to understand, if you think fascists play by the rules you are sorely mistaken.
If you read what I wrote and thought I was worried about how this would affect votes then you've missed the point completely. They do not care about votes or elections, their figurehead is literally on trial for trying to overturn the last one.