We can carry this a bit further. How does someone lacking these skills deal with students? I don't know all the details of his case, but I wonder how he handled grading inquiries and disputes with students, and how willing he was to adjust his teaching to meet the needs of the students.
And just to be clear, I'm well aware of claims (right or wrong) that teaching doesn't matter, but this is different from student evaluations of teaching.
The conversation seems to have drifted to a premise that when the other faculty didn't agree with him he called them morons. But the only basis for that is that he is being outspoken now. His contention is that simply by trying to be innovative and contributing is ways that might make other faculty look (deservedly) bad, he was punished.
The tenure vote he describes reminds me of the Blanket Party scene in Full Metal Jacket (https://www.youtube.com/watch?v=TCNqKrX1sx8), and I think it is the same lesson: conform or suffer the consequences.
And just to be clear, I'm well aware of claims (right or wrong) that teaching doesn't matter, but this is different from student evaluations of teaching.