When it comes to expressing opposition to a particular issue or cause, the term "campaign against" is frequently used. However, there are a variety of other phrases that can be used instead of "campaign against" to convey the same sentiment. For example, one could say "protest against," "resist," "oppose," "combat," "fight back," or "push back." These alternatives may vary in their level of intensity, but all convey a similar sense of speaking out or taking action against something perceived as negative or unjust. Using different synonyms can help to add variety and nuance to our language and ensure that our message is conveyed effectively.