Devon beat me to it. I knew it was a LAPD chief that had made the public statement some years back, but I couldn't remember his name.
The instructor in question may have just been making a stupid and ignorant statement without malicious racist intent, but it's worth noting that there is a correlation between unquestioningly buying into these sorts of myths and outright racism. (For an easy example, look at Daryl Gates's original statement contrasting black people to "normal" people.) I wouldn't assume the seminar instructor is necessarily a virulent racist, but I might pay extra attention in any future interactions with him.
It's also worth noting that there many degrees of racism. Being racist isn't limited to folks who say "I hate members of <group x> because they are subhuman beasts who deserve to die." You don't have to be a KKK member to be a racist. It can be subtle. Sometimes it can be a subconscious assessment of individuals you encounter that you don't realize is influenced by race. Sometimes it can be a willingness to accept myths and stereotypes about a given group without stopping to think and question them.
People aren't even necessarily internally consistent about their prejudices. I've known people who intellectually have espoused racist ideas in general - but in actual interaction with members of the group in question they (so far as I have observed) treat them as individuals without prejudice. I've also known people who do the opposite - say all the right things in general, but don't act accordingly.
It's also useful to remember that being racist doesn't mean someone is an evil person. Racism is bad and has pernicious effects. However, it's a problem rooted in society as a whole more than a purely individual flaw. If someone grows up in a racist culture it's hard to avoid absorbing at least a little bit of racism into their viewpoint. Even members of a minority group being discriminated against can unconsciously absorb some of the prejudices against their own group.
I think the above factors are worth noting because I've seen a number of my white friends and acquaintances who are highly resistant (or downright upset) at the idea that systemic racism against minorities still exists in the U.S.. As far as I can tell, the internal subconscious process goes something like this: "Racism is bad. I know this. I'm not a bad person. I don't hate black people. I despise groups like the KKK. These protesters are saying that there is systemic racism in this country disadvantaging black and brown people compared to white people. That's the same as saying white people are all racist. I'm not racist. They're saying I'm a bad person because I'm white. Therefore these people protesting racism are the real racists."
Sorry if some of that went above and beyond the original question. I've just seen too much crap posted on Facebook by friends that I don't have time or energy to spend every day arguing with.