As to worrying about "Europe burning" if she wins, can there be any doubt that the potential arsonists desire that outcome eventually regardless?! They just aren't quite ready to light the torch, foreseeing their chances of ending in charge improving if they wait longer. Although in several countries, their once moribund potential opposition is now at least conscious and growing, even though the center remains scared into appeasement. Premature ignition might just shock some of the current appeasers from awoke into awake.
Recall how things break in the real world when her song's title becomes reality. Hurricanes strike; right thinking, independent, problem solving Americans jump into action and deal with all the resultant problems. Left thinking, liberal problem causing, sheep mull around bleating to be rescued. And drown rather than save themselves if the rescuers don't arrive in time. Yes, the numbers in parts of Europe are daunting, but doubt not which side will underachieve and which will overachieve.
Concentrated populations of lefties can do much damage but can they survive without the support of rest? And are they competent enough to organize and force their will on the rest? Or are they just powerful enough to keep making the resultant mess bigger until they die from their own waste products? The world has seen Europe recover from huge messes twice, in just over the past century and more times in recorded history. I rather it didn't, but it could happen again. But better outcomes are still possible.
Well thought out and food for thought. Those points including “are they competent enough to organize and force their will on the rest?” are worth pondering.