Perhaps you don't understand Free Market Capitalism. Twitter is a publicly traded company. Their editors have a responsibility to their stock holders to make sure that it gains and holds value for their investments. Your posting, while you may see it as funny, may look to them like Kathy Griffin holding the severed head of a well known politician. She may have thought it was funny, but, many people found it to be vulgar and offensive. Many of those people would never vote for that politiciann. Twitter does not share your radical view of what is funny.
There are plenty of botique sites in the open market, where your humor would probably be considered tame. I post things on this site that I think are more humorous than political. I post them on the "Fun," page. Recently someone went through the hundreds of postings I have made and complained that four of them, only one in the last month, seemed to be more political than humorous. IMGFLIP agreed with them and took them down. I will err toward posting borderline memes in politics rather than humor, so that I stay within the site's guidelines. Observing reasonable rulles is the price I pay for having free access to this site. That is how things work in capitalism. People protect the value of their product, by keeping others from making it offensive to the majority of their custmers and owners.
Have a nice day.