I have been to Ziyarah and Arbaeen but not for Umrah or Hajj as I believe my expenses for the latter will aid those involved in the murder of the Yemenis. Will Allah (swt) accept my reason?
The Haj is wajib to perform for a person who is able (mustati').
Despite the very regrettable action of the regime in power in the region, our Maraje' have not guided otherwise.
The constant Shi'a presence is vital in this global gathering of Muslims and you should go if as soon as you are able.
Regards