https://theaviationist.com/2014/09/19/su-24-violated-swedish... for example

They also violate NATO airspace

https://ukdefencejournal.org.uk/russian-fighter-jet-violates...

And more

https://www.bbc.co.uk/news/world-europe-29956277

It's quite rare, it makes headlines everytime they do it. If you think that it's a common occurence and just shrug you shoulders then you are wrong. Especially since it was political this time.