...said no Irishman ever.
Tá aithne 'am ar chúpla daoine nach n-aontaíonn leat.
You know a few people that would disagree with him?
Yep. Though it's more similar to "I know a couple people who don't agree with you"
Go raibh maith agat. :-)
Not true look up the pioneers. A significant minority swear off the stuff
You can also say, ní thaitin beoir liom
why does it sound like beior has a D sound in there?
beoir ends in a slender r, a sound that is unfamiliar to most English speakers.
This video might help you come to grips with it.