See, that's exactly what I mean. Trump regularly made statements (and Tweets) condemning those types of violence after they happened, but your perception of it is that he just ignored them, and I'm not sure why that is.
Christchurch, for example, where he referred to it as a "horrible massacre" and a "vicious act of hate."
https://www.reuters.com/article/us-newzealand-shootout-usa-idUSKCN1QW1M8
Or when that Florida supporter was mailing bombs to prominent Democratic Party members:
https://www.cnn.com/2018/10/24/politics/trump-suspicious-package-response/index.html
Even the most recent:
And, while I think his handling of Charlottesville (and many, many other things) was abysmal, he did condemn the violence immediately:
News anchors and pundits have repeated lies about Donald Trump and race so often that some of these narratives seem true, even to Americans who embrace the fruits of the presidents policies. The...
www.realclearpolitics.com
And did so even more strongly a few days later:
His statement comes after an initially tepid response in which he had condemned the "egregious display of hatred, bigotry and violence on many sides."
qz.com
This isn't comprehensive mind you, just from some quick searching. There are almost certainly attacks he never mentioned (you named a couple that I don't even recall, which is a sad commentary on recent events if there ever was one!), but it isn't as if he isn't condemning these acts when they occur. He is, and he does so with the same type of language used by his peers.
I can only assume it is because people perceive him as being less genuine, so they write it off or ignore it, but I don't really know.
Don't misunderstand me: I'm not a Trump supporter, and I do think his rhetoric is encouraging these events, and it would be in all of our best interests for him to stop using it. It's just that it isn't all that different from Sanders who also uses similar divisive rhetoric (99% vs. 1% with Trump using Rep vs. Dem which largely shakes out to White vs. Non-White) and then condemning the acts of violence they spawn whilst continuing to espouse the same rhetoric.
All that said, I grant that Trump's rhetoric is more extreme in most (perhaps even all) cases when compared to Sanders', but with that being the case, the difference between them is not one of kind, but of degree.