Now it's close to home, happening to people like us. Now it's a genuine concern and those who are close enough in Europe are forced to process those worries, go through them, make scenarios, visualize the loss because it may be their loss soon.
When Russia was bombing the hell out of Syria very few people felt the visceral hate or fear they feel now. And I bet far fewer people remember that this is even more recent than the Crimean invasion and that they've kept bombing Syria well into 2021. When Russia was invading Georgia we just watched the news and shook our heads. Same when Russia and Turkey were fighting their proxy wars in the Caucasus, Western and Central Asia. All too far from us to care.
It was all about thoughts and prayers until the bombs hit close to home.
Lebensraum really scares people. Religious conflict are concerning, but the French wasn't directly worried that the UK might go after them next once the Northern Ireland situation got settled.