If you are against the opinion, I would like you to rethink about it.
If you oppose the opinion, I want you to consider it again.
be against ~ : ~に反対
oppose (動・他)：反対する
rethink ：考え直す
スピーチの最後だと、wantをwould like にして丁寧な表現にした方が良いと思います！
want 人 to do : 人に～してほしい
=would like 人 to do
参考になれば幸いです!
日本 
