I'll only eat you if you're rich.
The person in question didn't argue against green energy, they argued for local European solar industry. While one of the consequences in this case could be Europe being able to install less solar, this is something to introduce in your counterargument, highlighting the consequences.
Being hostile drives people away, and this particular commenter is probably not a decision-maker in European solar, so you're not missing anything if you kindly introduce an alternative point of view. It is politicians in office that we should pressure, as they have something real to lose when we don't support them. Shitting on regular people, on the other hand, will simply get your opinion ignored.