In this case if they have evidence, they should be investigated as is being done.

My critique is on the general sense of tolerance/intolerance as that can be vague, although unjustified incitement of violence or violent action is a good place to draw a line. However what is a call to violence can be tricky to parse sometimes.

Sure, but your methodology for determining what is an anti-democratic idea should be really tight, before you raid/arrest people.

No one wants murders in their society, but showing that they did that action is more important than stating that an action is wrong/anti-democratic/immoral etc.