No one except for Bnei Noach, and such alliance also has limits.
alliance maybe the wrong word, there is nothing wrong in having bilateral relationship. Read what the Chief Rabbinate of Israel has to say about there relations with Hindus..
" In keeping with the Delhi declaration, the participants reaffirmed their commitment to
deepening this bilateral relationship predicated on the recognition of One Supreme Being, Creator and Guide of the Cosmos; shared values; and similar historical experiences. The parties are committed to learning about one another on the basis of respect for the
particular identities of their respective communities and seeking, through their bilateral relationship, to be a blessing to all."
"It is recognized that the One Supreme Being, both in its formless and manifest aspects,
has been worshipped by Hindus over the millennia. This does not mean that Hindus
worship ‘gods’ and idols’. The Hindu relates to only the One Supreme Being when
he/she prays to a particular manifestation."
Having ties with Hindu Nationalists should be of no problem, since Hindu nationalists do not focus on Hinduism much, rather unity of Hindus as a political force for national integrity and security.
Read: Hindu Nationalism: What's Religion Got to Do With It?
http://www.apcss.org/Publications/Ocasional%20Papers/OPHinduNationalism.pdfAlso Israel has had trade relationship with India since the days of King Solomon..
anyways, with all said, the same cannot be said of other right wing orgs around the world.