It is your opinion that it is a bad thing and that it affects all his other points. That's why you felt the need to cite those points. And you did the same in this comment, which is again an ad hominem.

When a debater makes a lot of bad points, extrapolating to be suspicious of any point he makes is not and ad-hominem.

And ad hominem is when you dismiss his points because he might have done something immoral in a completely unrelated field.