Al-Baqarah 2:137

Fa-in amanoo bimithli ma amantumbihi faqadi ihtadaw wa-in tawallaw fa-innama hum fee shiqaqinfasayakfeekahumu Allahu wahuwa assameeAAualAAaleem

So if they believe in the same as you believe in, then they have been [rightly] guided; but if they turn away, they are only in dissension, and Allāh will be sufficient for you against them. And He is the Hearing, the Knowing.

So, if they believe in the same way as you believe, they will have certainly found the right path, and if they turn away, then the fact is that they are in antagonism. Then Allah will suffice you against them, and He is the All-Hearing, the All-Knowing.