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

The grammar is okay, but the words are not as idiomatic as I think you want. I might just say "please relax".

Answer

In the scenario you have given I would use the the raising tension,,

if it was myself in a heated meeting and some one start to raise their voice I would say.

"There is no need to add tension to this meeting, please calm down."