Only because one nation exists next to another nation, they don´t like each other compulsorily. And there are different stages of "don´t like" - USA-Canada or Netherlands-Germany for example - lots of cliches, but still works. UAE, Saudi Arabia, Iran, Pakistan and India in one group on the other hand.... I seriously don´t envy the Mod of this future League-forums.
To put it all in a nutshell: Before even thinking about a merge, u should investigate, which nations u CANNOT merge for political, historical or cultural reasons. Watching ur suggestion, I don´t think u´ve done this (for more than 5 minutes, at least), and because of this, there is no arguable basis.
No offense intended...