It’s also worth noting that the bourgeoisie doesn’t just compete for power with the other two classes (proletariat and petit-bourgeoisie) - it also competes internally. And for that, different factions within the class will seek external support from different groups, and align their discourses to those.

And if someone were to ignore that and view them as a single-minded monolith it can easily be explained as divide & conquer tactics.