Are you allowed to abuse other religion?

Chapter 17. The Divisions of Faith

TEXT 15

anudvega-karam vakyam
satyam priya-hitam ca yat

SYNONYMS
anudvega--not agitating; karam--producing; vakyam--words; satyam--truthful; priya--dear; hitam--beneficial; ca--also; yat--which;

Austerity of speech consists in speaking truthfully and beneficially and in avoiding speech that offends.

The Hidden Treasure of Al-Qur'an

http://www.harekrsna.de/artikel/Quran.htm
http://www.harekrsna.de/artikel/Color-of-Allah.htm 

Diety Worship - A Muslim Perspective Clarified

http://worshipinformation.blogspot.com/2009/12/diety-worship-muslim-perspective.html

For 40 years, Muslim discourses on Hindu scripture

http://www.thaindian.com/newsportal/feature/for-40-years-muslim-discourses-on-hindu-scriptures-feature_100281548.html

Kabirs View

http://www.spiritualawakeningradio.com/kabiryugas.html

Book

http://joomla.esotericteaching.org/books/Prabhupada%20on%20Islam.pdf

The Importance of Rama In Arabian Culture

http://www.pucl.org/Topics/Religion-communalism/2002/rama.htm

My Muslim Brother

https://www.youtube.com/results?search_query=My+Muslim+Brother

Islam & Krishna consciousness

http://www.salagram.net/Islam-and-Krishna.html

Linkages between two God-men saviors

http://www.religioustolerance.org/chr_jckr.htm
http://www.religioustolerance.org/chr_jckr1.htm

The Hidden Story of Jesus

Bhavishya Purana: The Prediction of Jesus Christ

http://www.stephen-knapp.com/jesus_predicted_in_the_vedic_literature.htm

Maha-Mantra and Christianity

Thus the understanding would be such:

• KRISHNA - Bhagavan - The Original Supreme Personality of Godhead. (The Father)
• RAMA - Paramatma - Balaram, the original spiritual master. (The Son)
• HARE - Brahman - The impersonal all pervading energy of the Lord. (The Holy Ghost)

Another understanding is this one:

• KRISHNA - Bhagavan - The Original Supreme Personality of Godhead.
• RAMA - Lord Rama, Lord Parasurama or Lord Balaram.
• HARE - Sri Radharani - Mother Hara, the internal potency of the Lord.

Krishna and Jesus Christ

http://www.harekrishnatemple.com/bhakta/chapter27.html