Seize who’s assets exactly? The second you draw a line and say anyone on the other side has fewer rights than you, you’re falling right in line with those same right-wing policies.
There is no way to define a law against “right-wingers” that doesn’t infringe on basic rights like freedom of opinion and freedom from discrimination. You can’t punish people for being part of a group. You need to point to something specific that each individual has done that is illegal before prosecuting. Anything less and society will break down into fascism.