... 反対に => on the contrary N3
Compare
に対して => towards; against; regarding; in contrast with ~​ N3
のに対して => towards; against; regarding; in contrast with ~ N2
に行く/に来る/に帰る => go/arrive/go back (to do something) N5
…と (は) はんたい (反対)に => opposition; resistance; antagonism; objection; dissent N3
Compare
に[対「たい」]して/に[対「たい」]しては => In response to (topic) A, in regards to A, considering A, in contrast to A N2
Reason, Result, Response
に[対「たい」]して/に[対「たい」]しては => In response to (topic) A, in regards to A, considering A, in contrast to A N3
Reason, Result, Response
へ => Go to N, head to N , Often followed by verbs like 行く/いく, 来る/くる, 向かう/むかう… N5
Particles