I don't think there is hypocrisy on Greta's part, not if you understand what what she wants. She doesn't just want to re-tool current economic systems and societies from fossil fuels to renewable. She wants something far more radical: that we drastically reduce our energy consumption. In fact drastically reduce all our consumption and live far simpler lives.
So within this, opposing certain renewable projects isn't necessarily hypocrisy. It does, however, highlight the tensions and contradictions at the heart of the "renewable revolution". We are moving from very high density energy production using fossil fuels, to very low density using wind, solar and tidal. The footprint our energy production occupies is going to get much bigger - we will industrialise far more of our countryside and pristine environments. These turbines don't exist on their own - they need connecting the to the grid, they needs roads built to build and access them.
The Sami are one of the very few remaining traditional cultures left in Europe and that's only the case because they live on the literal fringes of the continent and their land has been considered largely worthless for industrialisation, living space and agriculture. How it turns out there now is an industrialisation that makes sense: wind turbines can generate a constant stream of money electricity that will benefit us capitalist consumers in our cities. Not to mention the fortunes it could make the new energy barons (who I suspect are often the same people as the old ones).
To reduce our CO2 output and increase our energy security, Europe has to go down the renewables path. However this doesn't mean it is a "green" revolution - it could well lead to increased degradation of our natural environments to benefit the built ones. Saving the global environment could destroy local ones at an increasing rate - I understand why Ms. Thunberg would like to save both, but I don't know how we do that....well apart from radically changing our lifestyles, which I suspect most of us won't vote for.