I wouldn't be so categorical about France. Pro-russian/ “anti-war” political parties earned the majority of votes (but not seats) in the last elections, and the personality of Macron is so divisive (he has had record low approval for most of his tenure) it really impairs support for war.
Right. Aggression can only be tolerated up to a point before it triggers a response. Remember, on 1 September 1939 the Nazis invaded Poland and two days later both the UK and France declared war on Germany.
“and two days later both the UK and France decided not to intervene and just set up defensive position in Belgium and eastern France” is what actually happened. With the terrible results we known for France (the defensive position being hammered on its weakest point, leading to the complete collapse of the French army in less than a month.
https://www.bundeswehr.de/en/news/eastern-flank-new-brigade-...