French phrase
Je ne suis pas d'accord avec l'idée que ~.
Meaning
I don't agree with the idea that ___.
When to use it
Politely opposes an opinion or idea. It often leaves room for reasons or alternatives.
Example dialogue
Je ne suis pas d'accord avec l'idée que les enfants doivent travailler.
I don't agree with the idea that children should work.
Je comprends, mais je pense qu'ils doivent rester enfants un peu plus longtemps.
I understand, but I think they should stay children a little longer.