Politicians lie for votes. You and everyone knows this. A person will say what ever is popular. But a person’s actions won’t change as much. If you want to get roped in by a speech and a commercial, fine. But records don’t lie.
Actions do change though. Biden in particular has shown himself to be someone who serves as a barometer for the party. If the party moves to the left, he will move with it. I see no reason to assume that Biden will suddenly start pushing Trump-like policies, when, if he does, his own party will eviscerate him. The power of voters does not end at election day, unless we let it.
Crime has since skyrocketed in dem states following the initial BLM protests and subsequent police cuts. The “soft on crime” approach is equally fallible in that it creates a revolving door of people in and out of the crim justice system. Also makes it ripe for abuse.
Not sure if you've noticed, but there is a pandemic going on which has put millions of people out of work.
Also, in most places, funding cuts have not yet been put into place...
Additionally, the opposite of "tough on crime" is not "soft on crime". It is "smart on crime". At the present, going to jail increases your likelihood of committing another crime. That is not a sign that our "tough on crime" policies are working, it is a sign that we need change.