People have religious structures surrounding them, and in them. People work out their philosophy, theology and often, depend on them more than Jesus. So, there are numerous people that Jesus has worked through a process of stripping away these structures that people build.
The stripping process is very scary. The ground we stnd on seems to vanish beneath our feet. All the things we were sure of do not hold up anymore.
God want us to trust Him, so He needs to be the foundation. So, He intends to shake, sift and remove anything “false” that we rely on.
I put “false” in quotes, because often our foundation may even rest on true or good things. But, if the truth distracts us from real devotion to the person Jesus, we will eventually find ourselves going through the a stripping away.