"When we have a search warrant and we are in front of a house and the door is locked, and you know that the criminal is inside of the house, the population will not accept that you cannot enter."

Well, I think that some other situation should be used to depict this problem. Something like

“When we suspect that there might be some criminal activity but we do not know who, where, when and how but we want to search all the houses in the whole world without any search warrant, the population would simply ask us to GFY and they would be right”

Isn’t it Europol?