İIs an İIstanbul dea dangerous city

In English, the capital of i is I. İ and ı are not used in English. This is even true when naming Turkish cities.

There is only one Istanbul, so it doesn't use an article.

I things İk Istanbul is not dea dangerous city .

There is more than one city on the other hand, so city needs an article

Yes beingthere are some bad events there but this isose could be everanywhere.

"events" are plural so "those" instead of "this".

There are people that are helpful and, nice and kind.

In English we normally don't repeat and in lists like this, instead we used commas and only use "and" before the last item.

They arework together work without familiar.knowing each other

I had to guess at the intended meaning for this sentence, it wasn't clear.

I like very İreally like Istanbul.

The people are very kind abouto tourists there.

Of course haveit has bad events, but this not do theredoes not mean it is a deangerous city

İIs an İIstanbul dea Dangerous cCity?

This is a question, so needs a question mark.
Title capitalization rules.

I things İk Istanbul is not dea dangerous city .

Yes being, some bad eventsthings happen there, but this is could bat's true everywhere.

There are people helpful and, nice and kind people.

They arework together work without familiar.

I don't know what you mean by "without familiar," but if you try to explain I can try to help with a suggestion.

I like very İreally like Istanbul.

The people are very kind abouto tourists there.

Of course have bad events, there is some crime, but thit is not do therea deangerous city.

To avoid repeating again "some bad things happen" we can replace it with "there is some crime" since it is indirectly what we are speaking about when we talk about danger.