:Both is good, ideally the more offensive the better, but anything that means "fuck the border", "down with borders", "destroy the borders", "against borders". In English, the "border" can be  singular, in Bengali it might need to be plural as in French. The most important thing is the message ) e.g. in German: "shit on the border", in Armenian "to hell with the borders", in Hebrew "stick your cock in the border" etc. The best way in your language ) -  

Toxicity label: obscene