[calani]

Though I do not like the way you worded your request or follow-up posts, I agree with your motive: having all but one kingdom allied breeds hostility towards that neutral nation.
Ultimatums are a dangerous matter, especially when your side is the weaker of the two and both sides know it. In such a scenario, issuing one will either solve the problem or, likely, seal your fate. Do be more careful.

Upon agreement from the rest of the kingdoms, I will remove the alliances.