Your assertion that Twitter has somehow "deplatformed" half of the electorate, despite even a cursory look at the site showing a vast amount of Republican and pro-Trump content, and the fact that far less than half the country even voted for Trump to begin with, is ridiculous, and it's obvious from your comment history that you're a troll account anyway.
But yes, Parler, Gab, Voat and other alternative platforms were created by right-wingers specifically to have a "safe space" where they could post freely without having their views confronted. They were not deplatformed to those sites, they left for those sites willingly.
Good day AnonDataSci.