Can you blame them ?
Given what the white have done in the past 300 years(look at yer country. You robbed and butchered the original inhabitants), i would say it would be a while till the colored world trusts the white again.
And i guess Woolmer(a fella whitey) or Richardson( another whitey) are playing the race card too
And if you feel that the umpires have not been biassed but merely erroneous, then you should have no problems with the introduction of technology in it.
Technology can be faulty(although cyclops, snicko and hawkeye are more accurate than umpires), they definately cannot be biassed like a human being can be.