That’s more specific. “Class struggle” is something Marx made up.
By class, in this case, I mean category.
Christ offered no commentary on how to rearrange society — to rearrange categories or classes or groups — to achieve some improvement in temporal, worldly conditions.
Christ MENTIONS things of worldly interest, but his topic is NEVER temporal, worldly, civic, social, political, economic, etc. affairs.
Everything he says concerns your soul.