I think the tensions are due more to cultural than racial differences. Asians are more reserved and team-oriented than other cultures while Latino players are more demonstrative. This can lead to cultural clashes.

Also, young players are more boisterous and less-respectful than the older players, and this can lead to clashes, as well.

I assume you mean between players. Yes because players are human beings. There is a human natural inclination to prefer our on kind be it same city folks, same country folks or same race folks. Yet all Gov'ts brain wash us into preferring our own country over other countries which is no different then being trained to prefer our own race over all other races.

Yes

Yes and sadly it probably still exists. Below is a link to an instance which I truly hope is no longer part of the sport, but it wouldn't surprise me if it does. (Skip to chapter 14 which begins with << In the early 60s >> if you're bored.)

http://baseballsacramento.com/Spotlight-...

Most likely

Only in Boston.

I`m sure there is, but there isn`t too much media coverage of it, rightfully so.

with the variety of ethnicities, races, and creeds in the game, black, white, Latino, Asian, etc not to mention a variety of politics and national pride at stake, it seems racial and ethnic tensions would be inevitable

does it happen, if it does it does not seem to leak out too often