Thanks for asking.
I thought he was evasive and at times less that truthful during the nomination process, and I have issues with some of his positions (including those he seems to deny). But I'm firstly an American who believes in the Constitution, the rule of law, and proper procedure. It is with this last, that I have a problem.
So even though I may have some issues with Kavanaugh, I can accept him (and others!) if I respect the process. Just as I can accept a SC decision where I may otherwise disagree. I respect the SC authority, and I welcome it. Unfortunately, I cannot respect the process of the Judicial Committee without an FBI investigation. I say this without animus. I believe the Committee is abrogating its proper duty for political expediency, and I don't respect it. The old saying
"Respect is earned", is very true, and it is true here for me.
I must also add, though: Kavanaugh's bombastic behaviour yesterday, has added a new wrinkle to this. I no longer believe he has judicial temperament, and his refusal to accept an investigation leads me to now additionally question his truthfulness in the matter.
For reference, here's the ABA article. Their concerns are the same as mine (Process - FBI Investigation):
(ABA) Letter to Judicial Committee