You say it like it's something easy when in the qur'an it's one of the worst thing someone can do.
"O you who have believed, do not take the Jews and the Christians as allies. They are [in fact] allies of one another. And whoever is an ally to them among you - then indeed, he is [one] of them. Indeed, Allah guides not the wrongdoing people."
" O you who have believed, do not take the disbelievers as allies instead of the believers. Do you wish to give Allah against yourselves a clear case?"
"Let not believers take disbelievers as allies [i.e., supporters or protectors] rather than believers. And whoever [of you] does that has nothing [i.e., no association] with Allah, except when taking precaution against them in prudence.1 And Allah warns you of Himself, and to Allah is the [final] destination."