collision

be on a collision course

if two people or groups are on a collision course, they are doing or saying things which are certain to cause a serious disagreement or a fight between them. All attempts at diplomacy have broken down and the two states now appear to be on a collision course. The British government is on a collision course with the American administration over trade tariffs. (often + with)

See also: course

put/set someone on a collision course

be on a collision course - if two people or groups are on a collision course, they are doing or saying things which are certain to cause a serious disagreement or a fight between them. Her statements to the press have put her on a collision course with the party leadership. (usually + with)

See also: course, set