Почему ближайшие западные соседи России чинили всяческие препятствия её связям с западноевропейскими странами? Чего они опасались?

Was Mary  eight last month?  Mary was not  eight last month
Was Jack at school yesterday? Jack was not at school yesterday
Were the children good at running? the children were not good at running
Was Mr Green  in Russia last year? Mr Green was not  in Russia last year
Were the Browns in Great Britain? the Browns  were not in Great Britain