Speaking out against something is battling it, battle is a verb in this context. Both Oxford and Webster agree [0,1].
Forceful suppression of pseudoscience can be achieved through law and education, see the Scopes Trial [2]. This is another with thousands of examples, from women's right to vote, to smoking cigarettes.
You didn't say anything about force in your initial statement. Maybe you forgot to mention enough context? (And no, forcefully does not mean using force.)