You pulled out with something like 3 seconds for the cyclist to stop? Really, you pulled out too close in front of the cyclist; a cyclist can often, usually stop in that time but your manoevre required of the other road user the completion of an emergency stop, which carries far more risk than you can decently expect others to face.
If your attitude is that its fine to just nose out into the traffic regardless, then for everyone elses safety get the hell off the roads.
As for being rude, no one was rude to you. Your description of what the cyclist said shows him (her?) to have been pretty considered. Then you, representing your employer in a readily identifiable company vehicle, chose to compound an unsafe manoevre with being abusive. Had someone, say, in a shop done that then she'd have probably lost her job.
In short, you cannot demonstrate that the cyclist did anything wrong, yet you think its okay to be abusive and to take risks with the cyclists safety. You believe that its okay to be rude while representing your employer. You have, furthermore, contradicted yourself on various aspects of what happened when challenged, changing your story to try not to come off as badly as you otherwise are.
You're here to try to gain some absolution from cyclists (who, oddly, you believe will speak for the cyclist you were unpleasant too) for your rather poor behaviour. You deserve none.