1. This was a serious over-reaction under any circumstances, even in the USA where it would be odd. Grown woman running out of a room? Others may have apologized, but imagine what they think of her and said about her after she was gone. No business for her.

2. Traveling means learning local customer before hand. It's not just about whether the other guy kisses you, but how you hand over a business card, topics which are OK to discuss and not OK to discuss, who pays for dinner, whether a small gift is appropriate, and whether it's OK to say no to food & drink (some places that's an insult).

3. OP's friend needs to learn quickly or get a new job.