Could you check these few sentences, please? Thank you.

1) What are people intolerant about (is "of" also possible)?
2)They are intolerant about the color of the skin, religion and clothes.
3) They are prejudiced against people of other religions.
4) In the past, she got hurt by people's comments. Now she has learned to be strong and face them.
5) It's better not to get offended by people's comments. If you are friendly to people they will in their turn be friendly to you.
6) We should try as far as possible to be tolerant about (of?) people of other religions or with a different skin color. We shouldn't judge people by the way they are dressed (clothes style?) but by their character.
We shouldn't judge people by appearances.
7) I think Jews and Palestinians, Muslims and Christians should learn how to live together and suspend hostilities.
8) Does the word "writing materials" exist?

Most are fine. Choose the 4 or 5 you may have REAL questions about!!

Overall, most of the sentences you provided are grammatically correct. However, there are a few minor adjustments that could be made for clarity and correctness.

1) The sentence "What are people intolerant about?" is a grammatically correct way of asking the question. However, using the preposition "of" instead of "about" is also possible in this context. Both "intolerant about" and "intolerant of" are commonly used phrases.

2) The sentence "They are intolerant about the color of the skin, religion, and clothes" is grammatically correct. However, it would be more accurate to say "They are intolerant of" instead of "intolerant about" in this case.

3) The sentence "They are prejudiced against people of other religions" is grammatically correct.

4) The sentence "In the past, she got hurt by people's comments. Now she has learned to be strong and face them" is grammatically correct.

5) The sentence "It's better not to get offended by people's comments. If you are friendly to people, they will in turn be friendly to you" is grammatically correct. However, it would be better to rephrase the second part of the sentence as, "If you are friendly to people, they will reciprocate with friendliness."

6) The sentence "We should try as far as possible to be tolerant about (of?) people of other religions or with a different skin color. We shouldn't judge people by the way they are dressed (clothes style?), but by their character" is grammatically correct. However, it would be more accurate to say "be tolerant of" instead of "be tolerant about." In addition, it would be clearer to say "We shouldn't judge people by their clothing style" instead of "We shouldn't judge people by the way they are dressed."

7) The sentence "I think Jews and Palestinians, Muslims and Christians should learn how to live together and suspend hostilities" is grammatically correct.

8) Yes, the phrase "writing materials" does exist. It refers to the tools or supplies used for writing, such as pens, pencils, paper, etc.