Oh this is easy: a gigantic funding increase is being used to massively expand workforce with minimal training, then that workforce is being deployed with an ambiguous mission and apparent arrest quotas, while also being told they’re immune from any criminal liability for their actions (they’re not), including internal memos telling them they’re allowed to enter private homes without judicial warrants (they’re not), and a SCOTUS decision that is being represented to mean that racial profiling is legal now (it's not)
Deploying literal hordes of poorly trained, well-armed men onto American streets with explicit guidance that runs directly contrary to the US Constitution's plain text can, will, and SHOULD attract crowds in opposition.
It's completely intentional choice by the Miller/Noem wing of the admin to create media drama and "own the libs", overriding the Homan wing which was pushing for easy wins rounding up known criminal offenders in custody / in red states / etc.
Deploying literal hordes of poorly trained, well-armed men onto American streets with explicit guidance that runs directly contrary to the US Constitution's plain text can, will, and SHOULD attract crowds in opposition.
Hope that helps!