He saw what was going on the temple grounds....
Which was buying and selling, an abomination before God's sacred temple grounds...as in a den of thieves.
Selling was allowed OUTSIDE the temple and on other days than the Sabbath.
Proof of Law
18 U.S. Code s/s 248:
(2)by force or threat of force or by physical obstruction, intentionally injures, intimidates or interferes with or attempts to injure, intimidate or interfere with any person lawfully exercising or seeking to exercise the First Amendment right of religious freedom at a place of religious worship.
Amazing how Don Lemon violated the law
But the media gives him a pass as a black gay man