Yes...if they are trying to entice you away from the True and Living God.
Have you read those passages lately?
God Himself says he would give this false prophet the power to perform miracles and reveal prophecy, but the false prophet would try to seduce the people away from God's Law and towards strange gods unknown to Judaism. The purpose would be to test whether we are truly committed to living under the Law, or whether we will be dazzled and fall for the temptation to join a false path to salvation (v. 3-6, 7-8, 11). In this Biblical passage, God repeatedly commands the Jews to kill this false prophet, lest the evil spread and destroy many souls.
To be accepted by the people, the false prophet would sometimes pretend to be a righteous Jew who fulfills the Law, but at key moments he would turn against certain details of the Law in order to make the breach (v. 6, 7).
In Deuteronomy 17, this false prophet is also described as someone who would rebel against the authority of the judges of the Jewish people, and who should be put to death for his rebelliousness (v. 8-13, esp. v. 12). Who are the judges? The highest court in Israel was the Sanhedrin, which was established by Moses (Exodus 18:13-26; Numbers 11:16-29), and which lasted more than 15 centuries. The members of the Sanhedrin were the rabbis known as "Pharisees" (Pirushim, "those with the explanation"). God gave permanent authority to these judges to interpret the Law and God's Word, and it is a commandment to follow their decisions without turning even slightly to the right or the left (Deut. 17:11). But the false prophet would challenge the authority of the Sanhedrin, thus revealing himself to be an evil man.
This is all sounding awfully familiar.
In Matthew 5:17-19, Jesus declared that he came to fulfill the Law, and in Matthew 23:1-3 he defended the authority of the rabbis. But the rest of the time, he rebelled against the Law—thus showing that his occasional words of piety were meant only to hide his agenda. The following 'sins' of Jesus are recorded:
1. Jesus repudiated the laws of kosher food (Mark 7:18-19). [Compare this to the prophet Daniel's strict adherence to kashrus, in Daniel chapter 1.]
2. He repudiated the laws of honoring one's parents, and called on his followers to hate their parents; he also dishonored his own mother (Matthew 10:34-36; Matthew 12:46-50; Luke 14:26).
3. He violated the Sabbath by picking grain, and incited his disciples to do the same (Matthew 12:1-8; Mark 2:23-26).
4. 4) He again violated the Sabbath by healing a man's arm, which was not a matter of saving a life, and he openly defied the rabbis in his total repudiation of the Sabbath (Matthew 12:9-13; Mark 3:1-5). [Compare this to God's view of violating the Sabbath, in Numbers 15:32-36, Nehemiah 10:30-32, and dozens of other places throughout the Bible.]
5. Jesus brazenly defied and disobeyed the rabbis of the Sanhedrin, repudiating their authority (Do I really need to point out examples?)
