[VS1999]

Being caught up in "reactive nonsense" is an oxymoron. By definition you're saying they're reacting to something else, so they're not the ones pushing it.

[lupire]

I think parent meant "reactionary"

[tayo42]

Oxymoron is two contradictory terms.

Opposite of reactive would be non-reactive maybe. Opposite of nonsense would be something making sense