If the Trump administration has failed to resolve the GCC rift, how can it have the GCC form a military alliance?

If the Trump administration has failed to resolve the GCC rift, how can it have the GCC form a military alliance?
GCC countries have spent billions of dollars on US arms. Will that guarantee their security?
Donald Trump’s recognition of Jerusalem as Israel’s capital will further isolate the US from the rest of the world.
This year’s GCC summit in Kuwait fell apart within hours. Will there ever be another GCC summit?