Is faith without works dead?

For as the body without the spirit is dead, so faith without works is dead also.

James 2:26 

What does it profit, my brethren, if someone says he has faith but does not have works? Can faith save him?

James 2:14 

Paul led a group to meet with James and the elders in Jerusalem: 

When they heard this, they praised God. Then they said to Paul: “You see, brother, how many thousands of Jews have believed, and all of them are zealous for the law.

Acts 21:20 

but they have been informed about you that you teach all the Jews who are among the Gentiles to forsake Moses, saying that they ought not to circumcise their children nor to walk according to the customs.

Acts 21:21 

Now when Peter had come to Antioch, I withstood him to his face, because he was to be blamed; for before certain men came from James, he would eat with the Gentiles; but when they came, he withdrew and separated himself, fearing those who were of the circumcision.

Galatians 2:11‭-‬12 

You see that a person is considered righteous by what they do and not by faith alone.

James 2:24 

Did James believe in work-based salvation? 

Why did Paul have a conflict with James if they believed the same thing? 

Resources: 

https://96tolife.blogspot.com/search?q=Faith+and+works&m=1

https://www.livinggodministries.net/living_god_ministries/radio_archive/faith_works.htm