Citing a single anecdote doesn't do much to support the insinuation that those who support firearm regulation (in general) lack a basic understanding of the issues. It doesn't make any kind of a point at all, really.
Citing a single example of a legislator talking incoherently about firearms while trying to regulate firearms seems a fairly reasonable example of "gun owners get nervous when people who don't understand firearms try to [regulate] their ownership". That makes no claim that only people who don't understand firearms try to regulate them - such a claim may or may not have been intended.