Can someone confirm for me whether Trump was speaking about Ben Carson when he made the Seventh-day Adventist comment? I didn't hear the connection.
Did you really watch the video? Go back and watch it.
Just before he brings religion into it, he mentioned the "2 Iowa Polls" (showing Carson ahead) and says he doesn't believe it, and right away he mentions he is a Presbyterian—a denomination that he described as “down the middle of the road.” He then made a contrast to Carson’s denomination: “I mean, Seventh-day Adventist, I don’t know about, I just don’t know about.” Who else would he be talking about but Carson?
Did he insult SDA by what he said? I don't think so, but with Trump’s poll numbers slipping to second place behind Carson in Iowa, his statement was calculated to attract more evangelicals. He doesn't have to insult the faith himself - just bring it into the discussion. There are enough evangelicals with engrained prejudices against other faiths, that he just needs to plant the seed to get the evasive poison ivy to grow.
If you still need evidence he was talking about Carson, then ask Trump himself, for later when asked, he did not deny it. He just said that he said nothing wrong - which technically is correct.