「反対する」対「反対にする」

[okunote]

I was wondering if someone could help me understand the difference between these two phrases: 反対する and 反対にする

Thanks in advance!

[trykyn]

反対する　means to oppose something, to be against
反対にする　means to put (something) in the opposite state

for example, you can 反対にする　an on/off switch

the difference is immediately clear if look at what に　or にする　means,
to put sth into that state, in the case of hantai,put something in the opposite state

without the に　its not putting sth into the state, but actually doing
so it becomes to oppose

[okunote]

なるほど。。。

お返事ありがとうございました！