Memes

it shows that Marx sees that the state is bourgeois and therefore antagonistic to the proletariat.

Yes. The German state at the time was antagonistic to the proletariat. The Feudal state in Germany was in the process of transferring power to the bourgeoisie and that process didn't end up happening until after WW1 because the German revolution failed. The goal of the manifesto was to solidify that the new German state post revolution would be worker controlled and not controlled by the new German industrial bourgeoisie.

This quote says nothing about "The State" as a concept or entity being bourgeois, only that the state is an opressive/antagonistic force that is currently bourgeois.

If you want to try and claim that Marx said "All States are Bourgeois", you're going to need to dig a lot deeper than the Manifesto and you'll not find any consistent answer as his views on that changed throughout his life and after the revolutionary movements in Germany (Revolutions of 1848 the first failure and when the Manifesto was written), America (Civil War 1865 see The Civil War in the United States), and France (Paris Commune 1871 see The Civil War in France).

As he saw how the bourgeois power structures maintained themselves through these successive revolutions, he began to become much more clear on the role of a workers state in maintaining the revolutionary movement.