Yeah, it was/is. Really it's all conditional. I keep hoping a secular Israel will turn to God for a spiritual Israel. Just how did they think that 6-Day War came about?
“When all these blessings and curses I have set before you come upon you and you take them to heart wherever the Lord your God disperses you among the nations, and WHEN you and your children return to the Lord your God and obey Him with all your heart and with all your soul according to everything I command you today, then the Lord your God will restore your fortunes and have compassion on you and gather you again from all the nations where He scattered you.” (Deut. 30:1-4)
and again:
“IF you obey the Lord your God and keep His commands...” (Deut 30:10)
How much more evidence would you like about the covenant’s being conditional and also that the old covenant became obsolete?
If that’s not enough evidence, then read 1 Kings 8 again. Read Jeremiah 7. Read Hebrews 8. Or if you don’t believe in the Bible, then note that there was no Israel for over 2,000 years — they lost it due to unbelief.
If you believe it was unconditional, you’d have to ignore a whole lot of scripture, not to mention, history.