"Do YOU think that the UN is unfair to Israel"

No I don't THINK it is unfair the evidence is clear.

"if so, why?"

See the fourth link in the post of 05 Mar 15 - 12:02 PM

"Why do you think that Israel gets told off so often?"

See above and:
Israel at the UN: A History of Biasand Progress

"Don't you think that UN Watch might just be a wee bit biased?"

No.