In China you will be more likely swindled than robbed outright.
Only real unfriendliness I encountered was Israel, we met many people there that just didn't seem to care about us at all, no matter how much we asked for help or directions.
I agree that good, normal, polite, helpful people were a vast majority during my trips abroad (but almost always just within Europe, so that doesn´t help you I guess).
But sometimes as a female tourist, you get into unpleasant situations.
My trip to Turkey (conference, off season), into a larger town in a favourite tourist destination. I´ve met several independent groups of young men (20-30) during a 2 hours walk through downtown, that without any provocation behaved very aggresivelly, their gestures and grimases were you know very clear, have closely surrounded us and stalked us even trough we ignored them and later tried to tell them off. We were just ordinary tourists - on main streets with shops, long throusers, camera around our necks, old female coleage with me, lunchtime. It was a very very unpleasant feeling, they ignored our personal space and tried to touch. They ignored polite gestures and words and even our angry shouts done nothing. Definitelly my last trip to Turkey and any other arab country without a male companion. If they were drunken, or if that would be just one person or one "gang", I would say whatever, just bad luck to meet some rare deviants. But it looked as a normal behaviour for them, "just fun" and they didn´t stop even with old local people (males) around that ignored the scenes.
It was probably my mistake somehow (wrong clothes? wrong gestures? wrong time and place?). But that day, I just wished to be born as a male, to be spared of such encounters. I´ve never before felt so ...helpless, disrespected and "dirty".
I would stay out of Syria sounds fairly dangerous
Yeah Turkey, despite being secular, still has a very Arab/Muslim attitude towards women who are unaccompanied by a male and who do not wear a head scarf. I loved the history and tourist attractions of Istanbul but I hated the attitude of the men.
You would be surprised. I lived in Turkey for a while and yes you have a part of society that is deeply religious. This does not mean though that they expect any woman to wear a head scarf! There is also a big part of society that see woman wearing a head scarf as a political statement and oppose it. I have to admit that Istanbul brings the best and the worst together and I had female friends that felt uncomfortable in certain areas. If you would travel into Anatolia the situation is a lot different and the situation for women is a lot more comfortable. Travelling by buss is actually the most common way of getting around and also very safe. So is there a rule that a woman decides if a strange man sits next to her or not. As a single man travelling it can mean you have to wait for the next bus and that a seat will be left open.
Turkey wants to be European/western, but they are still middle eastern/Muslim at heart. I'll not be visiting again.
Sorry you had a bad experience, but Turkey is Western, Middle Eastern and Muslim at the same time. The issue is quite complicated and the population is very split and even if you say Muslim you miss the very big differences there are within the different movements in Turkey. But we are at a Zoo forum so I will leave it for now. Just one remark: Muslim and European are not contradictory and we have Muslim countries where the debate if they are European or not is not considered relevant like Bosnia-H. and Albania.