Why did Gerhard Erasmus clash with the umpire?

Namibian captain and all-rounder Gerhard Erasmus bowled brilliantly against India. He took 4 wickets for 20 runs in 4 overs. In one over, Erasmus bowled the ball from far behind the crease. Almost past the umpire. After this the umpire declared it a dead ball. Gerhard Erasmus was unhappy with this. After that there was a lot of talk between the two. Gerhard Erasmus called it part of his tactics.

Gerhard Erasmus also dismissed Tilak Verma while bowling from far behind the crease. Apart from Tilak, Erasmus also dismissed Ishan Kishan, Hardik Pandya and Akshar Patel. There is a lot of discussion now about the bowling of Erasmus. His action put the Indian batsmen in trouble.

The condition of the match was like this

Batting first after losing the toss, India put 209 runs on the board for 9 wickets. In response, Namibia’s team was bundled out for 116 runs and India won the match by 93 runs. Now on 15th February, India is going to face its arch rival Pakistan in Colombo. Pakistan has also won both its matches played so far in the World Cup. There is full expectation of a high voltage contest between India and Pakistan.