This is what I wrote. Do not copy this word for word, write it your way.
I was aghast to learn that Russia has sought to stifle political dissent by blocking news sites and closing these sites. This is very much against the spirit of glasnost that the great Mikhail Gorbachev used some 25 years ago when he brought the Soviet Union into the modern world.
To be healthy a society needs its citizens to be able to speak freely, otherwise it will stagnate: innovation will suffer if new ideas are frowned upon, we live in a changing world, if we do not change then we slowly decline.
This is as much about science & technology as it is about politics. If you stifle political thought then you chill all thought and the country will suffer.
Mr Putin is putting his short term comfort before the long term health of Russia. Please tell him this this is neither good for Russia nor the rest of the world.
Please convey this email to the ambassador.
If you are not aware of what I talk about, please read: https://www.eff.org/deeplinks/2014/03/russia-blocks-access-major-independent-news-sites