When many MPs were trying to get peace in Northern Ireland, Corbyn was one of many that met with those involved, including terrorists. Had he (and others, including John Major) not we might never have got peace, and yet the rightards (including the rightard press) accuse him of being a terrorist sympathiser for it.
Now he doesn't want to sit with Trump, when there is no reason for him to, and you accuse him of "wanting to ban and boycott everything he disagrees with". The real stupidity of rightard politics.
What you REALLY seem to want is for him to refuse to talk to people YOU disagree with and those only. It's interesting isn't it?