The technical definition of solution is this: a solution is a homogeneous mixture composed of only one phase. What you have here is a solute and a solvent combining to form something entirely new with properties different from the constituent parts. Solutions cannot be separated into their individual parts after they are mixed.
I would propose that this is the type of diversity that we want, that this is very beneficial to our country. This is the historical diversity of the American Colonies and post-Revolutionary War America. It is the diversity of Ellis Island and the genesis of idea that America was a “melting pot”. People brought their varied heritages with them but ultimately blended and combined to catalyze into Americans – not Italian-Americans, German-Americans or Mexican-Americans – just Americans. While they maintained a fondness for their origins, they subjugated that fondness to the love, devotion and loyalty to their new home.
A mixture is a material system made up by two or more different substances which are mixed but are not combined chemically. The materials are in suspension and the heavier particulates will eventually precipitate or fall out of solution the minute that the mechanical mixing action stops. This is the “diversity” that we have today – it is what Britain has. Disparate groups with allegiance to foreign countries intent on retaining those loyalties. Rather than assimilate, they retreat to cloistered areas and resume the same customs and lifestyles as their old countries, most refusing to even learn the language of the United States.
It is a mistake to assume that all people who come here legally or illegally are here to become part of America. The common excuse for illegal immigration from Mexico is economic. Once these illegal aliens satisfy their economic goals, they have no need to assimilate – being here illegally also creates a secretive culture, assuring that assimilation will never take place. Legal immigration assures that the people who come to America are coming because they desire to actually become an American, not simply as a method by which to satisfy an economic need. There is a purpose for the process of legal immigration that transcends simple protection of sovereignty.
Creating diversity for its own sake creates a mixture, not a solution. Mixtures are weak and eventually break down. Solutions do not.