[boomoo]

Lisa has always disliked Freddie as soon as she heard his background.

So why does she like Kenneth?

He went to a private school which is called the Eton of Scotland. This means his parents have money. He talks about his wealth in a way that Freddie never does. He talks down to people in a way that Freddie never did.
The complaint about about Freddie was that they did not understand his language. That did not mean Freddie was talking down to them just using different language.

We have various accounts of what Kenneth might be but Lisa even put up with him after he has said awful things about Sophie and Karly.