All tenure does is largely protect you from getting fired. They can still do a fair amount of damage though you still have employment. Lab space can be reduced, it can get harder to get approvals for research, decreased funding etc.
Sure firing is still possible, but be ready to prove in court it was done properly.
Quick firing like in US, only if it was something really bad and even then, a notice period might be required.
In what country can you not fire your own employees?
In Germany, you need strong reasons to fire an employee: intentionally causing accidents/damage, theft and other felonies related to your work (so, no firing your employee for drunk driving off the job) or failure to improve performance. The other thing is due to closing of the department or the location or the company going bankrupt, but these cases are often enough fought over in court and especially if the company is not bankrupt it's difficult to get someone fired.Which means: those hit the most hard by "fire at will" are the poorest.
It's still a powerful tool in any country regardless if it's the default or not.
I don't think it is reasonable to require research conclusions to be censored or changed just because big money is involved.
Why don't the opposition fund some independent research or independent replication study if they believe so strongly that this research needs to be shown incorrect.
How'd it go for Charles Murray?