>> Why is it a bad thing?
Because it achieves NOTHING. If the goal is to help those affected, the ONLY way to do that is by engaging with the administration. The only way you can engage with this particular administration is by not shitting all over it no matter what it does. This is what Musk is attempting to do. What the protesters are doing is ACTIVELY HARMFUL to that goal, because it makes softening of the restrictions politically unfeasible.
On the other hand if the goal is to show each other how "progressive" you are, sure, go ahead and block the airports, burn effigies, beat and torture Trump supporters, etc. But don't act all surprised when this leads to nothing of consequence.