If my employee makes a slur against "n*ggers" while he has black coworkers, it is not the same thing as simply copy-pasting Kirk's own words on gun violence being an acceptable consequence of the 2nd amendment.
Europe has laws against hate speech that Americans think reach too far, but the positive side effect is that employers are not the one doing the calls - which they do instantly, under pressure, without any chance for the employees to defend themselves. A European firm has no basis to fire an employee until a court has reached a conclusion - the best they can do is suspend the employee.