She is not unique, nor is she the only one to have been condemned.

This is because LePen is being condamned based on a law from 2016. (That she voted BTW)

The cases you mention here are older and cannot be judged through this law in France.

Well

1. EU do not have any petroleum source. Buying oil directly supports our adversaries.
2. You can instead invest in the defense industry. EU needs more than ever to convert factories to arms factories. This is how you prevent people from being unemployed.
3. We still have to prepare for a post-carbon world, or defending EU existence and state of law etc will be all for nothing. Climate change is really going to bring chaos worldwide.