Can I stop my allies from attacking me if I ally with the Grox?

If I get an ally's friendship score up to about 250 before allying with the Grox, will they still instantly hate me and attack me or will they remain allies?

Solution 1:

It is possible to have allies even if you are allies with the grox.

You may be REALLY good friends with them and still have a good relation with them, even after you ally the grox.

You can use a monolith to become allies with a new species, that will not give you a negative score for being allies with the grox, if they reach the space stage AFTER you became allies with the grox.

You can be in war with a species, until they ask you to not attack them anymore, that will make your relationship with them relatively neutral.