It reminds me candle sellers were against electricity because they would lose their jobs if the world adopted a better technology, what inevitably happened anyway and these people had to find alternative ways to work for a living. That is the normal as things are constantly evolving and something that is a necessity now won't be necessary anymore when we find a more efficient method to fulfill that same objective.
What shouldn't happen is to stop evolving because some people can't adapt themselves to changes in life.
People who act corporately are blind by their own selfish that they can't see the benefits they could also have by adopting green sources of energy.
Such protests may have a short term impact, but it won't block the inevitable. If something is ineffective compared to something else, then no matter how much the supporters protest, it can't be held afloat for too long. In the end, it is up to the consumers to decide whether he or she want to use it or not. The only option left here is to improve the efficacy or make it more affordable. Else, the alternative will gain acceptance. Now you can't force the people to use a commodity which is more expensive and unaffordable compared to the alternative.
I suppose you mean the renewable sources of energy are expensive if compared to their efficiency, right?
And that is actually true, because there isn't incentive from the government to make people adopt it. There isn't any governmental propaganda to educate people regards this matter. Moreover, most equipments to set the solar system up come from another countries (they are imported), making them very expensive. The government shouldn't charge any taxes on this, because it's something we don't have access in our country and could be even considered basic need goods. As it couldn't become worse, congressmen are already passing a law to create a tax over solar energy production, so people who supply their homes with renewable energy will have to keep paying taxes to the government anyway.
The same could be said about the electrical cars which are still scarce and very expensive if compared to the traditional alcohool or gasoline cars.
However, despite all difficulties and sabotages it may still worth the investment on long run. To reach to a conclusion it's needed to get a quote of how much the solar system costs to supply your house, and next you calculate if a loan is a good idea. Sometimes the loan monthly parcel is the same amount of money you pay to your energy provider right now.