Re: Cold Sensei
People all have their own hangups (in my experience!) There are some people who are good at aikido and not so good at human relations, or indeed have rather strange(!) characters. In an extreme case, I know of a high ranking sensei who basically stopped teaching women - apparently his wife didn't like him having any physical contact with other women... More than a little frustrating for the various senior women in the organisation.
Similar to other's advice: keep your own centre, behave according to your own principles, keep an open mind and don't assume the blame for other's lack of insight, and be patient - the answer will appear in some form of another over time.