turn against

US /tɜːrn əˈɡenst/
UK /tɜːrn əˈɡenst/
"turn against" picture
1.

敵対する, 反抗する

to become hostile to someone or something; to betray or oppose

:
After the scandal, many of his supporters turned against him.
スキャンダルの後、彼の支持者の多くが彼に敵対した
The public might turn against the new policy if it causes too many problems.
あまりにも多くの問題を引き起こす場合、国民は新しい政策に反対するかもしれない。