To have a positive tone, it has to invoke a positive or "warm" feeling when you read it. The sentence has no positive or negative feel to it, it's just a statement.
The sentence isn't referring to anything that is put in place of something else — i.e. someone talking about a bird going silent but is actually referring to a mood or feeling — it's just a plain statement without talking about anything besides what is in the statement
90% of people marry there 7th grade love. since u have read this, u will be told good news tonight. if u don't pass this on nine comments your worst week starts now this isn't fake. apparently if u copy and paste this on ten comments in the next ten minutes you will have the best day of your life tomorrow. you will either get kissed or asked out in the next 53 minutes someone will say i love you
Intolerant means not being able to accept differences in opinions or other ideas, or someone who is unable to handle something. This includes being unable to endure something.