Are these sentences ok? Or what would you say?
In a meeting etc. somebody is raising their voice and acting in an aggressive manner , If I say like this;
There's no need to raise the tension.
There's no need to build the tension.
Are they ok? Or what would you say?

Question

Answer

I do not thing either of them are correct...or at least widely used.

Instead of those two, I would probably say something like:
"There's no need to be so tense."
"There's no need to raise your voice."
"There's no need to get so upset/angry."