This is the first poll taken after the conviction, and has us at 41% Biden/39% Trump
Actual voting preferences differ only slightly from one the same pollster took in early May, which had us at 35% Biden/36% Trump.
Having a solid sense of how the conviction will impact things will likely take a week or so as news percolates and people talk.
I’ll also note that these to polls are polls of adults, which tend to favor Trump by a little bit more than polls of registered voters or of likely voters.
Archived copies of the article: archive.today ghostarchive.org
It’s probably just people who aren’t paying attention. You are correct in your analysis of the average trump supporter, but they are not a monolith. Some people can be swayed because they literally don’t watch the news.