Question

براندازی نرم

Answer 1

Hi!

I have found these: 

Soft overthrow(ing)/ toppling of ...

 

The husband of Nazanin Zaghari-Ratcliffe, the British-Iranian woman detained in Iran since April, has hit back at accusations that his wife was fomenting a “soft overthrow” of the Islamic Republic.

 

An Iranian-British woman detained in Iran faces charges of trying to cause the "soft toppling" of the government...

 

 

https://www.theguardian.com/world/2016/jun/15/briton-rejects-accusation-spying-against-wife-imprisoned-iran-nazanin-zaghari-ratcliffe

 

http://www.dailymail.co.uk/wires/ap/article-3642823/Iranian-British-woman-faces-alleged-coup-charge-Iran.html

 

Ps:

There are also two other related terms used in politics: 

Soft war 

Soft power

Comments

Good

1+

Answer 2

Gentle/ quiet overthrow

Comments

1+ for 'gentle overthrow'

https://goo.gl/asrlA0

(It seems to be less frequently used than the Persian term)