Feminism: Good or Bad?

1) Why, is because ALL these -ists and -isms, most of which have infiltrated the English language (and other languages) relatively recently, are a political divisive tool (i.e. they create divisions in society). They also often support and / or reinforce other divisive terminology. These also often lead to stagnation of development, progress and thought in human societies.
It's a very old political strategy; divide and conquer. In many modern societies, divide and control, is more felicitous.

2) Simply reword the intention of your thoughts and communication, without using these -ists or -isms. You might be very much surprised on how much better you can communicate with others, as well as learning many new things.
You can sometimes still use the root word, from which the -ist or -ism is derived, but you will often need to find other (better) words, by using a dictionary, thesaurus or encyclopedia.

In your initial comment (above), you could have said something like:

Females who have divided themselves from society, are practicing another form of discrimination - they don't want equality (that's just what they write on their flags). They are often solely and strictly pro-female, but society includes males.