Absolutely. Succinct. I may not like Trump but we have to defend his right to say whatever he wants. If it's criminal - let him be charged with inciting hate. Otherwise shutting a whole opposition candidate - who won million of votes - is the most horrendous assault on freedom of free speech the US has seen in recent history. This is why some of his supporters resort to violence and guns. If both mainstream and social media shut you down - what avenue do you have. Start you own media house? How feasible is that? Everytime you disagree - you start you own facebook?
You---and surprisingly quite a few (ignorant) Americans too---have a serious misunderstanding of freedom-of-speech laws in the USA (and other countries with similar laws), despite numerous legal rulings that ought to have made things clear by now.
Such laws are largely about constraining government, and that has been made clear over, and over again, that they are not about constraining private entities.
Trump is certainly free to say whatever he wants; nobody is trying to stop him there. But he is not free to say it wherever he likes, and nothing entitles him to a right to say whatever he wants on media owned by others.
You disagree? Try getting getting to publish whatever you like in a newspaper or saying whatever you like on some TV or radio station, and if they don't allow you, sue them for violating your right to free speech. The fact that you cannot start your own newspaper, TV, or radio station in no way imposes an obligation on others to allow you to use their platforms in whatever manner you might wish.
If his rights are being violated, as you seem to suggest, why do you think Trump himself, a litigious fellow by any account, is not in court over it? Do you think it is because he and all the legal talent his money can buy ---not to mention his supporters, some of whom are serious and seriously-financed people---can't see the terrible violations of law that Nipate experts can obviously see?
If you let Google be your friend, you can easily find a lot of material to clarify the matter. In the meantime, here is a random short article for you:
https://www.jdsupra.com/legalnews/the-first-amendment-where-it-is-3482126/