What are some expressions of double-talk?

As follows:

1. Those who do one thing in front of others and another behind their back are villains. Similar villains should be treated with wisdom and not to interact with each other, otherwise, they will be defeated. People are still ruined!

2. During this period of time, I have really seen that there is almost no intrigue between people. People who do one thing in front of others and another behind the scenes are everywhere. Human beings. It’s really difficult to grow up in a short period of time, and it’s even more confusing.

3. Disgusting people do one thing in front of others and another behind the scenes. They think that their theories and knowledge are all right. They do not agree with the methods you mentioned on the surface, but secretly try them step by step. There are also people who look like they have been calm for a long time and don't care about anything in front of them, while they secretly rub their backs with all their strength.

4. Some people are really hypocritical, doing one thing in front of others and another behind the scenes. I know what kind of person you are. Really shameless. I finally see you clearly, you make me sad.

5. Sometimes it is very helpless. Adults prefer to do superficial things, doing one thing in front of others and another behind the scenes. It becomes a performance, which is boring and helpless, because you can't expose it and you can't explain it to outsiders.