I'm 100% against racism.
Everybody else is correct, however. That needs a definition. And not a textbook one with loose terminology.

Using the N word? Course à bad idea. Beyond that, you need to make it clear.

Is racism to you:

• Speaking disparagingly of a race without any facts relevant to the subject matter?
• Speaking disparagingly of a race with facts relevant to the subject matter?
• Focusing (mainly) on subject matter reflecting poorly on a race, or someone of a race?
• Sharing subject matter reflecting poorly on a race, or someone of a race?
• etc.

Personally, for me, its bullet point 1. Speaking with facts is legitimate critique, not racism.

It's important to allow such discussion.
Per example: Speaking as to how much crime migrants/blacks commit as opposed to other immigrants or native population is important for our future and being able to admit a problem exists is a baseline to solve prevent and solve such problems.