turn against
US /tɜːrn əˈɡenst/
UK /tɜːrn əˈɡenst/

1.
反目成仇, 反對
to become hostile to someone or something; to betray or oppose
:
•
After the scandal, many of his supporters turned against him.
醜聞發生後,他的許多支持者都反目成仇。
•
The public might turn against the new policy if it causes too many problems.
如果新政策造成太多問題,公眾可能會反對它。