Learn Italian: A volte l'idealismo deve fare spazio al realismo. - Sometimes idealism must make room for realism.

Yes, they are all masculine. The suffix -ismo is the Italian equivalent of the English '-ism' and is used to form abstract nouns related to ideologies, movements, or attitudes. Because they are masculine, you will always use masculine articles with them, like l'idealismo and il realismo.

Why do we say l'idealismo and al realismo with definite articles if the English translation just says 'idealism' and 'realism'?

Italian requires definite articles for abstract concepts and broad categories, unlike English which usually leaves them bare. So, 'idealism' becomes l'idealismo, and 'to realism' becomes al realismo (combining the preposition a with the article il).

To say 'make room', the sentence uses fare spazio. Why not use the Italian word for 'room', like stanza or camera?

Words like stanza and camera only refer to physical rooms in a building. When you mean 'room' in the sense of available volume or metaphorical capacity, you must use spazio (space). The fixed expression for 'to make room' is fare spazio.

Could I start the sentence with Qualche volta instead of A volte?