First of all, the current government doesn't give a shit about the first amendment and is successfully putting a chilling effect on it through various means. Both through illegally using government funding as a hammer to require independent companies to curtail their speech, or by using regulation.

Second, history will look back and realize that without taking into account the volume of your voice, you don't really have free speech in a way that matters. If you the person next to you can use a megaphone that is so loud that no one hears you, you effectively have no speech. A great many democracies implicitly realize this and thus have election spending limits tied to the number of supporters. The US, through it's lobby system, and through party affiliated control of third party networks, does not.

Musk is, indeed, allowed under the 1st to promote whatever he wants to promote. Him being a hypocrite about "free speech absolutism" is not a crime.

However, the current US administration appears to be actively violating the 1st and 5th in a bunch of ways, the 14th that one time, and making threats to wilfully violate the 2nd for people they don't like and the 22nd to get a third term. It is reasonable, not hyperbolic, to be concerned about Musk's support of this.

Actually the Trump administration is trying to strip legal status from people and deport them by way of an obscure law that gives the Secretary of State the discretion to do so if they deem those people a threat to the foreign policy goals of the US.

If these laws are still on the books when the next D administration takes over, they should use them against Elon, Thiel, etc - strip them of US citizenship, deport them, and nationalize their companies (followed with repealing those laws)

I disagree. He would be using taxpayer money to boost his preferred speech. And it is essentially campaign funding for the GOP. It should be treated as such.